PESO 2015 - 024 - GDG
A man and his dog ... https://flic.kr/p/reycea enjoy, G --- "I don't mind if you don't like my manners. I don't like them myself. They're pretty bad. I grieve over them long winter evenings." -- Philip Marlowe (Humphrey Bogart) -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO: Don't Mess With Australian Termites
well you made the right choice, Methinks - and who cares how many discards there were when you finally nail it... you really only need one :-) ann On 3/7/2015 23:23, David Mann wrote: I have a huge number of blurry shots and missed opportunities with those bloody termite mounds. It was quite frustrating. I was trying to get photos of the bigger ones but at the speed the train was going I had about 1 or 2 seconds to notice it, raise the camera, follow and shoot. Thank goodness for AF. Next time I'll walk so I can take my time! We must have been going a little slower past that one as I got two photos, and this was the better one. I did get plenty of photos of other mounds but the truck is why I chose to show this one. Cheers, Dave On Mar 8, 2015, at 4:11 pm, Ann Sanfedele wrote: Oooh I like that shot! ... great that you had the truck there - (well, and chose to shoot the cathedral with it of course ! Everything goes together so nicely. ann On 3/7/2015 21:27, David Mann wrote: I think these are cathedral termites. We passed an unbelievable number of their mounds, which ranged from ankle-height to ones like these which would have been well over my head. http://gallery.multi.net.nz/photo/884/#peso Cheers, Dave -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Sensor size vs. depth of field: explanation of the relationship please
That's not quite right. On 3/7/2015 11:49 PM, J C OConnell wrote: DOF increases when you go to a smaller format because the working Magnification is lower. On 3/7/2015 2:03 PM, John Francis wrote: On Sat, Mar 07, 2015 at 11:55:07AM -0500, Mark C wrote: The one factor I am ignoring is the "circle of confusion" and effect that enlarging the image itself has on the DOF of the final print and that is not something I have never been able to grok and so won't comment on. Maybe someone else can. Mark I consider that to be the most significant factor in the DOF of the final image. Ignore all mystical numbers like format, f stop, focal length, ... for now. The basic problem is you have three defining factors to consider. They are: 1) The size of the subject you are tring to capture 2) The size of the final image you are trying to create 3) How far away from the subject you can place the sensor You can juggle all the other numbers (how much of your sensor does the image cover says how much cropping and magnification you will have to do, etc.), but after a whole lot of maths you end up with one simple result: The size of the "circle of confusion" is basically defined by the actual diameter of the aperture (focal length divided by f stop); all the other numbers cancel out. That's why depth of field increases when you go to a smaller sensor; it's because you generally want to keep the exposure variables (shutter speed and f stop) around the same, and using a smaller camera system means that you can use a physically smaller lens aperture. This reduces the size of the circle of confusion (and thus allows for parts of the subject that are further away from the plane of true focus to still yield images which are perceived as being acceptably within focus; this is another way of saying that the depth of field is increased). -- I don't want to achieve immortality through my work; I want to achieve immortality through not dying. -- Woody Allen -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Sensor size vs. depth of field: explanation of the relationship please
DOF increases when you go to a smaller format because the working Magnification is lower. On 3/7/2015 2:03 PM, John Francis wrote: On Sat, Mar 07, 2015 at 11:55:07AM -0500, Mark C wrote: The one factor I am ignoring is the "circle of confusion" and effect that enlarging the image itself has on the DOF of the final print and that is not something I have never been able to grok and so won't comment on. Maybe someone else can. Mark I consider that to be the most significant factor in the DOF of the final image. Ignore all mystical numbers like format, f stop, focal length, ... for now. The basic problem is you have three defining factors to consider. They are: 1) The size of the subject you are tring to capture 2) The size of the final image you are trying to create 3) How far away from the subject you can place the sensor You can juggle all the other numbers (how much of your sensor does the image cover says how much cropping and magnification you will have to do, etc.), but after a whole lot of maths you end up with one simple result: The size of the "circle of confusion" is basically defined by the actual diameter of the aperture (focal length divided by f stop); all the other numbers cancel out. That's why depth of field increases when you go to a smaller sensor; it's because you generally want to keep the exposure variables (shutter speed and f stop) around the same, and using a smaller camera system means that you can use a physically smaller lens aperture. This reduces the size of the circle of confusion (and thus allows for parts of the subject that are further away from the plane of true focus to still yield images which are perceived as being acceptably within focus; this is another way of saying that the depth of field is increased). -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO: Don't Mess With Australian Termites
I have a huge number of blurry shots and missed opportunities with those bloody termite mounds. It was quite frustrating. I was trying to get photos of the bigger ones but at the speed the train was going I had about 1 or 2 seconds to notice it, raise the camera, follow and shoot. Thank goodness for AF. Next time I'll walk so I can take my time! We must have been going a little slower past that one as I got two photos, and this was the better one. I did get plenty of photos of other mounds but the truck is why I chose to show this one. Cheers, Dave > On Mar 8, 2015, at 4:11 pm, Ann Sanfedele wrote: > > Oooh I like that shot! ... great that you had the truck there - (well, and > chose to shoot the cathedral with it of course ! > Everything goes together so nicely. > > ann > > On 3/7/2015 21:27, David Mann wrote: >> I think these are cathedral termites. We passed an unbelievable number of >> their mounds, which ranged from ankle-height to ones like these which would >> have been well over my head. >> >> http://gallery.multi.net.nz/photo/884/#peso >> >> Cheers, >> Dave >> >> > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO: Katherine Gorge
Well composed shot, David. Jack - Original Message - From: "David Mann" To: "Pentax-Discuss Mail List" Sent: Saturday, March 7, 2015 6:24:04 PM Subject: PESO: Katherine Gorge Back to Australia... I took this as we were almost at the Aboriginal rock art site in Katherine Gorge. It was 38°C so we kept to the shade whenever possible. The tour operators were very good and I do recommend this excursion if you're ever in the area. http://gallery.multi.net.nz/photo/883/#peso Cheers, Dave -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO: Don't Mess With Australian Termites
Oooh I like that shot! ... great that you had the truck there - (well, and chose to shoot the cathedral with it of course ! Everything goes together so nicely. ann On 3/7/2015 21:27, David Mann wrote: I think these are cathedral termites. We passed an unbelievable number of their mounds, which ranged from ankle-height to ones like these which would have been well over my head. http://gallery.multi.net.nz/photo/884/#peso Cheers, Dave -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
PESO: Don't Mess With Australian Termites
I think these are cathedral termites. We passed an unbelievable number of their mounds, which ranged from ankle-height to ones like these which would have been well over my head. http://gallery.multi.net.nz/photo/884/#peso Cheers, Dave -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
PESO: Katherine Gorge
Back to Australia... I took this as we were almost at the Aboriginal rock art site in Katherine Gorge. It was 38°C so we kept to the shade whenever possible. The tour operators were very good and I do recommend this excursion if you're ever in the area. http://gallery.multi.net.nz/photo/883/#peso Cheers, Dave -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
PESO - Pine COne
http://www.markcassino.com/b2evolution/index.php/pine-cone-1 Pretty self explanatory. Mz-S, FA 28-105 f4-5.6 power zoom, Arista Edu Ultra 200 in Rodinal 1:50. Out in the snow yesterday. Comments welcome! Mark --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: OT - Anyone with experience with hiking poles?
I'll chime in too... in the early 2000s, when I was in my mid-20s, I did a pretty long and rocky hike by myself (Brown Mountain in the Angeles National Forest). I was in good health and never had any trouble with my joints. I used a pair of REI anti-shock trekking poles (made by Leki, I think) which I still have. Shortly after starting the return back to the car, I lost my footing and twisted my ankle. The poles absorbed the majority of the shock, but I still had a lot of difficulty hiking back out, and was sore for days. Without the poles, I might have been in very bad shape in terms of getting back to the car. I didn't see anybody else on the trail that day. That said, my poles do not attach to a camera, and I find them cumbersome to have around when I'm trying to use a camera or binoculars. I don't use them that much anymore (the trails I do now are not quite as rugged). But if you have any concerns about stability, I think they can be extremely worthwhile. On Sat, Mar 7, 2015 at 8:28 PM, Rick Womer wrote: > Brian, > > Rather late to the party, but anyway... > > If it weren't for hiking poles, I would have had to give up hiking in the > mountains 20 years ago (I'm 62), because going downhill was becoming too > painful for my long-ago-injured left knee. With poles the knee is fine, and > my stamina has become the hike-limiting variable instead. > > I'm a born klutz, and yes, they also help with stability. > > My current poles are Lexi Makalus, which weigh 600g (~1 1/4#) for the pair. > They are spring-loaded to absorb the jolts of going downhill, which I like. I > once bought a lighter-weight pair, and one of them snapped on the first hike. > > Since I switched to digital, I haven't once wished that one of them could be > a monopod or tripod. > > Cheers, > > Rick > > > > > On Mar 3, 2015, at 1:02 AM, Brian Walters wrote: > >> G'day all >> >> Ever since I had that stroke a couple of years ago I'm finding I get >> exhausted a lot quicker than I used to. This is curtailing my bushwalking >> somewhat. >> >> I'm wondering whether one or two hiking poles might help - these are the >> ones I'm considering: >> >> http://www.photographybay.com/2015/01/16/manfrotto-officially-launches-off-road-backpacks-walking-sticks-tripods/ >> >> One of the side benefits is that one of the poles has a camera mount, so can >> be used as a monopod. >> >> I should add that I'm not talking about extreme bushwalking - I doubt I'd be >> covering more than perhaps 4 or 6 km over uneven ground in any one walk. >> >> >> >> >> -- >> Cheers >> >> Brian >> >> ++ >> Brian Walters >> Western Sydney Australia >> http://lyons-ryan.org/southernlight/ >> >> >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > http://photo.net/photos/RickW > > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: OT - Anyone with experience with hiking poles?
Brian, Rather late to the party, but anyway... If it weren't for hiking poles, I would have had to give up hiking in the mountains 20 years ago (I'm 62), because going downhill was becoming too painful for my long-ago-injured left knee. With poles the knee is fine, and my stamina has become the hike-limiting variable instead. I'm a born klutz, and yes, they also help with stability. My current poles are Lexi Makalus, which weigh 600g (~1 1/4#) for the pair. They are spring-loaded to absorb the jolts of going downhill, which I like. I once bought a lighter-weight pair, and one of them snapped on the first hike. Since I switched to digital, I haven't once wished that one of them could be a monopod or tripod. Cheers, Rick On Mar 3, 2015, at 1:02 AM, Brian Walters wrote: > G'day all > > Ever since I had that stroke a couple of years ago I'm finding I get > exhausted a lot quicker than I used to. This is curtailing my bushwalking > somewhat. > > I'm wondering whether one or two hiking poles might help - these are the ones > I'm considering: > > http://www.photographybay.com/2015/01/16/manfrotto-officially-launches-off-road-backpacks-walking-sticks-tripods/ > > One of the side benefits is that one of the poles has a camera mount, so can > be used as a monopod. > > I should add that I'm not talking about extreme bushwalking - I doubt I'd be > covering more than perhaps 4 or 6 km over uneven ground in any one walk. > > > > > -- > Cheers > > Brian > > ++ > Brian Walters > Western Sydney Australia > http://lyons-ryan.org/southernlight/ > > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. http://photo.net/photos/RickW -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
FS Fryday + 1
Have a project and need to raise funds for it. So I'll part with some glass (sob, wimper) for now. 18-135 $300 FA35/2 $300 28-105 PZ version $75 - No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5751 / Virus Database: 4299/9249 - Release Date: 03/07/15 -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
Might have been Pup himself! Thanks, everyone, for your "likes" ann On 3/7/2015 19:07, Mark C wrote: Ha! Great catch. Reminds me of that old Frank Zappa lyric "..I'll .call up Pup Tentacle and ask him how's his chin, find out how the future was because that's where he's been" Mark On 3/7/2015 10:51 AM, Ann Sanfedele wrote: A time traveler left this message on First Avenue, in the East Village http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A ann --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
Most likely a temporary glitch, because by the time I got around to it it loaded quickly. On 3/7/2015 12:26 PM, Ann Sanfedele wrote: Bob - what browser are you using? Smugmug doesn't like Internet Explorer.. try firefox or chrome It also may just be a glitch today sorry If you are on Facebook, the photo is there too ann On 3/7/2015 11:31, Bob Sullivan wrote: Ann, That site takes way too long to load. I give up... Regards, Bob S. On Sat, Mar 7, 2015 at 9:51 AM, Ann Sanfedele wrote: A time traveler left this message on First Avenue, in the East Village http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A ann -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- Science - Questions we may never find answers for. Religion - Answers we must never question. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Scam, OT
On 7 Mar 2015, at 21:10, mike wilson wrote: > >> On 7 March 2015 at 17:56, Bob W-PDML wrote: >>> On 7 Mar 2015, at 17:05, P.J. Alling wrote: >>> >>> Looks like a scam to me. I've been getting calls from "Microsoft" support >>> lately, a heavily accented, usually Indian, voice, identifies as a member >>> of their support team to report that my computer has been comprimised with >>> some kind of Malwear, >> >> Could be worse. At least it's not Mal's underwear. > > It's a Mac. So it's rainwear > It would be Steve's jobs. It's turtleneckwear > But I thought this sort of > thing didn't happen to the Apple corps? > It's nowear... -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Scam, OT
On 3/7/2015 9:46 AM, David J Brooks wrote: This message popped up on my screen this morning with a recorded message say i needed to call this number my iMac may have these viruses on it. http://www.caughtinmotion.com/images/scam.jpg I am doing some google searches on this and it looks like a scam or phishing expedition, am i correct. I will be running my mac scan program shortly anyway Dave You've probably allowed some kind of SCAMware to install itself as an extension or plugin to your browser. -- Science - Questions we may never find answers for. Religion - Answers we must never question. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
Ha! Great catch. Reminds me of that old Frank Zappa lyric "..I'll .call up Pup Tentacle and ask him how's his chin, find out how the future was because that's where he's been" Mark On 3/7/2015 10:51 AM, Ann Sanfedele wrote: A time traveler left this message on First Avenue, in the East Village http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A ann --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: OT WordPress ???
Congrats to you daughter and son-in-law, and to you & Grandma! Regards, Bob S. On Sat, Mar 7, 2015 at 4:22 PM, Henk Terhell wrote: > My practice is to use the plugin MCE Table Buttons. With this you get easy > office-type buttons for table generation and controls. > In a table with two columns you can place pics at adjusted sizes. It won't > work in tables if pic sizes are too large so success is not always > guaranteed. > > Henk > > David J Brooks schreef op 7-3-2015 om 20:14: >> >> i have set up a WordPress blog in my grandson's name. its a nice clean >> look and easy to work with. one thing i wish i could do is tile the >> pictures. i see you can if you go into the code but i'm not sure about >> that. Is there an easy way to get the pictures tiled or at least put >> two to a row.?? >> >> http://clarkrwindsor.com/myblog/ >> Dave >> >> >> http://clarkrwindsor.com/myblog/ >> > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: test 2
On 3/7/2015 4:11 PM, Ken Waller wrote: Well, it's obvious that I'm back. You were gone ? That's my line. Kenneth Waller http://www.pentaxphotogallery.com/kennethwaller - Original Message - From: "frank theriault" Subject: Re: test 2 Well, it's obvious that I'm back. Sheesh! LOL -frank On Sat, Mar 7, 2015 at 1:49 PM, Stanley Halpin wrote: On Mar 7, 2015, at 1:38 PM, frank theriault wrote: How about now? "Now"? How can we know when now is? What is now now will soon be then and then no, not now. stan -- "Sharpness is a bourgeois concept." -Henri Cartier-Bresson -- I don't want to achieve immortality through my work; I want to achieve immortality through not dying. -- Woody Allen -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: test 2
Na, still can't read it. On 3/7/2015 1:38 PM, frank theriault wrote: How about now? -- I don't want to achieve immortality through my work; I want to achieve immortality through not dying. -- Woody Allen -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO: Hitching A Ride
You're right, Ann, loons piggyback their young, too; but have thrown them off by the time they get to the size of this juvenile grebe. Nice, David! Rick On Mar 7, 2015, at 11:00 AM, Ann Sanfedele wrote: > Sweet! > I've seen that IRL - seems to me there are some others that do that too - I'm > thinking I've seen loons with a baby piggybacking > > ann > > On 3/6/2015 19:39, David Mann wrote: >> It's been years since I saw crested grebes and I'd forgotten that they carry >> their young on their back. There was a small population because someone had >> built some nesting boxes for them on the lake. >> >> http://gallery.multi.net.nz/photo/881/#peso >> >> The focus wasn't quite perfect; I need a better camera! >> >> Cheers, >> Dave >> >> > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. http://photo.net/photos/RickW -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO: Fascination
Very nice subject, colors, and composition, but distractingly soft. Rick On Mar 7, 2015, at 10:55 AM, Daniel J. Matyola wrote: > http://photo.net/photodb/photo?photo_id=17976796 > Comments are invited. > > Dan Matyola > http://www.pentaxphotogallery.com/danieljmatyola > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. http://photo.net/photos/RickW -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Sensor size vs. depth of field: explanation of the relationship please
I understand what you are saying and completely agree. But you stop too soon. (Or maybe I go one too far.) I should comment that what you are calling the "circle of confusion" I would call a "defocused point" - i.e. any point that is not on the focal plan. I use the term "circle of confusion" the describe the size at which a defocused point loses apparent sharpness. A little thought experiment: Take a photo on 35mm with a 50mm lens at f8. The physical diameter of the aperture should be 6.25mm (50mm /8). Assume there is a point outside of the focal plan that is defocused but is within the DOF area and so appears to be sharp. Call the point P and its diameter D. Now I take the same shot from the same distance with a 6x7 using a 100mm lens at f8, of course needing the longer focal length to get the equivalent frame at the same distance. The physical diameter of the aperture is 12.5 (100mm / 8). Since the physical size of the aperture is now larger, the defocused point P is correspondingly larger and is 2xD. Being larger it would have less apparent sharpness. That would seem to confirm the idea that as the format gets bigger there is less DOF. But - now enlarge both those images to be 700mm wide. The 35mm exposure is enlarged 20x. The 6x7 exposure is enlarged by 10x. In both enlargements the diameter of point P is now 20xD. If the defocused point is now the same size in both prints, why would its apparent sharpness differ? (I'm obviously taking liberties by ignoring differences in aspect ratio and assuming that 6x7 is twice the size of 35mm, which it is not exactly.) Guidelines for circle of confusion size for use in DOF calculations scale with the size of the format. For example, Wikipedia's circle of confusion page says that the circle of confusion for 35mm is 0.029mm and for 6x7 is 0.059mm. That's what I don't get about the circle of confusion - it seems like all the DOF gained in small formats would be offset by the additional enlargement of the image to get it to viewing size. But that is not how things actually work. Mark On 3/7/2015 2:03 PM, John Francis wrote: On Sat, Mar 07, 2015 at 11:55:07AM -0500, Mark C wrote: The one factor I am ignoring is the "circle of confusion" and effect that enlarging the image itself has on the DOF of the final print and that is not something I have never been able to grok and so won't comment on. Maybe someone else can. Mark I consider that to be the most significant factor in the DOF of the final image. Ignore all mystical numbers like format, f stop, focal length, ... for now. The basic problem is you have three defining factors to consider. They are: 1) The size of the subject you are tring to capture 2) The size of the final image you are trying to create 3) How far away from the subject you can place the sensor You can juggle all the other numbers (how much of your sensor does the image cover says how much cropping and magnification you will have to do, etc.), but after a whole lot of maths you end up with one simple result: The size of the "circle of confusion" is basically defined by the actual diameter of the aperture (focal length divided by f stop); all the other numbers cancel out. That's why depth of field increases when you go to a smaller sensor; it's because you generally want to keep the exposure variables (shutter speed and f stop) around the same, and using a smaller camera system means that you can use a physically smaller lens aperture. This reduces the size of the circle of confusion (and thus allows for parts of the subject that are further away from the plane of true focus to still yield images which are perceived as being acceptably within focus; this is another way of saying that the depth of field is increased). --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Linda the "Rice Queen"
Frank, were there only three women racing?.. or were they jsut so far ahead of the back that you don't see anyone else... looks pretty slippery! fun stuff - really a shame about the robbery... geez.. ann On 3/7/2015 12:53, Knarf wrote: De-lurking for a bit: A couple of weeks ago Toronto had it's annual Ice Race, Icycle 2015. A downer is that someone stole the trophies and over $2000 raised for a charity (this year was a women's shelter). We're starting to get a fund going and several hundred in re-donations have been gathered so far. But on tbe bright side it was fun, as always. The 1600 ISO of the K10D really limits, but a few shots turned out - then I promptly lost the SD card so the dozen or so now processed are what we have. Perennial winner Linda came as the Rice Queen this year, and she didn't disappoint, taking the women's race for the third year running: http://knarfdummyblog.blogspot.ca/2015/03/linda-rice-queen.html?m=1 Hope you enjoy. Comments welcome. Cheers, frank -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: OT WordPress ???
My practice is to use the plugin MCE Table Buttons. With this you get easy office-type buttons for table generation and controls. In a table with two columns you can place pics at adjusted sizes. It won't work in tables if pic sizes are too large so success is not always guaranteed. Henk David J Brooks schreef op 7-3-2015 om 20:14: i have set up a WordPress blog in my grandson's name. its a nice clean look and easy to work with. one thing i wish i could do is tile the pictures. i see you can if you go into the code but i'm not sure about that. Is there an easy way to get the pictures tiled or at least put two to a row.?? http://clarkrwindsor.com/myblog/ Dave http://clarkrwindsor.com/myblog/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO: Hitching A Ride
OOOh - I like this one a bit better even though we don't see their eyes... so cute! ann On 3/7/2015 15:22, David Mann wrote: Thanks to everyone for looking and/or commenting. Here's another view which shows the piggybacking better. http://gallery.multi.net.nz/photo/882/#peso Someone was obviously keeping a good eye on the grebes as they'd posted notices up nearby which kept a diary of the chicks' progress. Cheers, Dave On Mar 8, 2015, at 6:55 am, Knarf wrote: Great shot! In a couple of months the red-necked grebes should be back here and I can't wait: love the grebes! Yours is brilliant. Thanks for sharing. Cheers, frank On 6 March, 2015 7:39:37 PM EST, David Mann wrote: It's been years since I saw crested grebes and I'd forgotten that they carry their young on their back. There was a small population because someone had built some nesting boxes for them on the lake. http://gallery.multi.net.nz/photo/881/#peso The focus wasn't quite perfect; I need a better camera! Cheers, Dave -- Sent from my Android device with K-9 Mail. Please excuse my brevity. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
I'm wondering if the "improvements" smugmug made in order to make it more mobile device friendly has anything to do with it or whether thre is just a lot of traffic to smugmug.. I have an idea though... when I send things to the list, I can reduce the initial image size to medium - maybe that would help... OF course, now that you said it just loaded mre quickly, this test may not work :-) Here is another PESO in the same gallery but smaller http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-ZskgDhH/M also - does my initial index page give you any problems? That is if you just do annsan.smugmug.com ann On 3/7/2015 12:34, Bob Sullivan wrote: Ann, Doing Chrome. Just tried again and got it right away. I often have this problem with your image posts. (And Cataract surgery in eye #1 went well. It's day 4 and distance vision is getting pretty good. But I can't read my digital watch, and depth perception is shot. My 2015 Accura MDX met the garage door opening for $1,800.) Regards, Bob S. On Sat, Mar 7, 2015 at 11:26 AM, Ann Sanfedele wrote: Bob - what browser are you using? Smugmug doesn't like Internet Explorer.. try firefox or chrome It also may just be a glitch today sorry If you are on Facebook, the photo is there too ann On 3/7/2015 11:31, Bob Sullivan wrote: Ann, That site takes way too long to load. I give up... Regards, Bob S. On Sat, Mar 7, 2015 at 9:51 AM, Ann Sanfedele wrote: A time traveler left this message on First Avenue, in the East Village http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A ann -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: test 2
Well, it's obvious that I'm back. You were gone ? Kenneth Waller http://www.pentaxphotogallery.com/kennethwaller - Original Message - From: "frank theriault" Subject: Re: test 2 Well, it's obvious that I'm back. Sheesh! LOL -frank On Sat, Mar 7, 2015 at 1:49 PM, Stanley Halpin wrote: On Mar 7, 2015, at 1:38 PM, frank theriault wrote: How about now? "Now"? How can we know when now is? What is now now will soon be then and then no, not now. stan -- "Sharpness is a bourgeois concept." -Henri Cartier-Bresson -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: test 2
And then there's DST ! Kenneth Waller http://www.pentaxphotogallery.com/kennethwaller - Original Message - From: "Stanley Halpin" Subject: Re: test 2 On Mar 7, 2015, at 1:38 PM, frank theriault wrote: How about now? "Now”? How can we know when now is? What is now now will soon be then and then no, not now. stan -- "Sharpness is a bourgeois concept." -Henri Cartier-Bresson -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Scam, OT
On 7 March 2015 at 17:56, Bob W-PDML wrote: > On 7 Mar 2015, at 17:05, P.J. Alling wrote: >> >> Looks like a scam to me. I've been getting calls from "Microsoft" support >> lately, a heavily accented, usually Indian, voice, identifies as a member of >> their support team to report that my computer has been comprimised with some >> kind of Malwear, > > Could be worse. At least it's not Mal's underwear. It's a Mac. It would be Steve's jobs. But I thought this sort of thing didn't happen to the Apple corps? -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: test 2
Nope. Kenneth Waller http://www.pentaxphotogallery.com/kennethwaller - Original Message - From: "frank theriault" Subject: test 2 How about now? -- "Sharpness is a bourgeois concept." -Henri Cartier-Bresson -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Scam, OT
I've been getting calls from "Microsoft" support lately, a heavily accented, usually Indian, voice, identifies as a >member of their support team to report that my computer has been compromised with some kind of Malwear, Same here. Kind of funny, when I ask them to identify their company they state Microsoft Department, carried on a conversation with one of them just for the heck of it and eventually he told me to go F..k myself. They were persistent and kept at it for a few weeks. Kenneth Waller http://www.pentaxphotogallery.com/kennethwaller - Original Message - From: "Bob W-PDML" Subject: Re: Scam, OT On 7 Mar 2015, at 17:05, P.J. Alling wrote: Looks like a scam to me. I've been getting calls from "Microsoft" support lately, a heavily accented, usually Indian, voice, identifies as a member of their support team to report that my computer has been comprimised with some kind of Malwear, Could be worse. At least it's not Mal's underwear. B -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: test 2
Quoting frank theriault : Well, it's obvious that I'm back. Sheesh! LOL I thought you were back a couple of weeks ago. So, you're back again, again? -- Cheers Brian ++ Brian Walters Western Sydney Australia http://lyons-ryan.org/southernlight/ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO: Hitching A Ride
Much better! Nice catch, Dave! Jack Sent from my iPhone > On Mar 7, 2015, at 12:22 PM, David Mann wrote: > > Thanks to everyone for looking and/or commenting. > > Here's another view which shows the piggybacking better. > > http://gallery.multi.net.nz/photo/882/#peso > > Someone was obviously keeping a good eye on the grebes as they'd posted > notices up nearby which kept a diary of the chicks' progress. > > Cheers, > Dave > >> On Mar 8, 2015, at 6:55 am, Knarf wrote: >> >> Great shot! >> >> In a couple of months the red-necked grebes should be back here and I can't >> wait: love the grebes! >> >> Yours is brilliant. Thanks for sharing. >> >> Cheers, >> >> frank >> >>> On 6 March, 2015 7:39:37 PM EST, David Mann wrote: >>> It's been years since I saw crested grebes and I'd forgotten that they >>> carry their young on their back. There was a small population because >>> someone had built some nesting boxes for them on the lake. >>> >>> http://gallery.multi.net.nz/photo/881/#peso >>> >>> The focus wasn't quite perfect; I need a better camera! >>> >>> Cheers, >>> Dave >> >> -- >> Sent from my Android device with K-9 Mail. Please excuse my brevity. >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO: Hitching A Ride
Thanks to everyone for looking and/or commenting. Here's another view which shows the piggybacking better. http://gallery.multi.net.nz/photo/882/#peso Someone was obviously keeping a good eye on the grebes as they'd posted notices up nearby which kept a diary of the chicks' progress. Cheers, Dave > On Mar 8, 2015, at 6:55 am, Knarf wrote: > > Great shot! > > In a couple of months the red-necked grebes should be back here and I can't > wait: love the grebes! > > Yours is brilliant. Thanks for sharing. > > Cheers, > > frank > > On 6 March, 2015 7:39:37 PM EST, David Mann wrote: >> It's been years since I saw crested grebes and I'd forgotten that they >> carry their young on their back. There was a small population because >> someone had built some nesting boxes for them on the lake. >> >> http://gallery.multi.net.nz/photo/881/#peso >> >> The focus wasn't quite perfect; I need a better camera! >> >> Cheers, >> Dave > > -- > Sent from my Android device with K-9 Mail. Please excuse my brevity. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: OT WordPress ???
You could try some methods from here: http://premium.wpmudev.org/blog/finally-getting-images-to-sit-side-by-side-in-wordpress/ At least one of them should work ;) On Sat, Mar 7, 2015 at 9:14 PM, David J Brooks wrote: > i have set up a WordPress blog in my grandson's name. its a nice clean > look and easy to work with. one thing i wish i could do is tile the > pictures. i see you can if you go into the code but i'm not sure about > that. Is there an easy way to get the pictures tiled or at least put > two to a row.?? > > http://clarkrwindsor.com/myblog/ > Dave > > > http://clarkrwindsor.com/myblog/ > > -- > Documenting Life in Rural Ontario. > www.caughtinmotion.com > http://brooksinthecountry.blogspot.com/ > York Region, Ontario, Canada > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO: Whale Belly Flop
Amazing photo, Dan! -frank On Fri, Mar 6, 2015 at 12:58 AM, Daniel J. Matyola wrote: > A humpback whale off the coast of Maui: > http://photo.net/photodb/photo?photo_id=17980354&size=lg > Comments are invited. > > Dan Matyola > http://www.pentaxphotogallery.com/danieljmatyola > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- "Sharpness is a bourgeois concept." -Henri Cartier-Bresson -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Scam, OT
On 2015-03-07 10:04 , P.J. Alling wrote: I've been getting calls from "Microsoft" support lately, a heavily accented, usually Indian, voice, identifies as a member of their support team to report that my computer has been comprimised with some kind of Malwear, i have been getting these for years, sometimes multiple times a day; i've tried all sorts of gambits such as: "i have 12 computers here, which one is infected?" "i don't understand, what should i press? … can you spell that? was that an 8 or an H? etc." "the only Windows i have here is Windows 2000 in a virtual machine with no network connections" (true) "you should go home to your family and tell them you are ashamed of what you are doing" in several cases i've had them curse at me or claim they'll come to my home and hurt me; somehow, they keep calling back; i often don't answer my landline at all because of it (don't have caller id), and i'm looking for how to move that number to a Google Voice account When I tell them that I'm a Microsoft certified professional and didn't make a support request, i'll have to try that next time -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO: Whale Belly Flop
On 2015-03-05 22:58 , Daniel J. Matyola wrote: A humpback whale off the coast of Maui: http://photo.net/photodb/photo?photo_id=17980354&size=lg i like the way the coastline provides some context on this shot -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: test 2
if i could hear yo i would say ok Dave On Sat, Mar 7, 2015 at 2:07 PM, frank theriault wrote: > Thanks, Dave. > > I'll have to try something else since that didn't work. > > :-) > > -frank > > On Sat, Mar 7, 2015 at 1:48 PM, David J Brooks wrote: >> nope >> >> Dave >> >> On Sat, Mar 7, 2015 at 1:38 PM, frank theriault >> wrote: >>> How about now? >>> >>> -- >>> "Sharpness is a bourgeois concept." -Henri Cartier-Bresson >>> >>> -- >>> PDML Pentax-Discuss Mail List >>> PDML@pdml.net >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>> follow the directions. >> >> >> >> -- >> Documenting Life in Rural Ontario. >> www.caughtinmotion.com >> http://brooksinthecountry.blogspot.com/ >> York Region, Ontario, Canada >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > > > -- > "Sharpness is a bourgeois concept." -Henri Cartier-Bresson > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- Documenting Life in Rural Ontario. www.caughtinmotion.com http://brooksinthecountry.blogspot.com/ York Region, Ontario, Canada -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
OT WordPress ???
i have set up a WordPress blog in my grandson's name. its a nice clean look and easy to work with. one thing i wish i could do is tile the pictures. i see you can if you go into the code but i'm not sure about that. Is there an easy way to get the pictures tiled or at least put two to a row.?? http://clarkrwindsor.com/myblog/ Dave http://clarkrwindsor.com/myblog/ -- Documenting Life in Rural Ontario. www.caughtinmotion.com http://brooksinthecountry.blogspot.com/ York Region, Ontario, Canada -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Linda the "Rice Queen"
Yeah, there were a few good ones this year. Linda's was among the best. If you look at the top photo of Linda standing with her bike, you can see the studs - screws, actually) sticking out of her tires. And if you can't see them, rest assured, they were there. Thanks for the comment, Bob! -frank On Sat, Mar 7, 2015 at 12:58 PM, Bob Sullivan wrote: > Terrific outfit! > I can't make out any studs on the tires...? > Regards, Bob S. > > On Sat, Mar 7, 2015 at 11:53 AM, Knarf wrote: >> De-lurking for a bit: >> >> A couple of weeks ago Toronto had it's annual Ice Race, Icycle 2015. A >> downer is that someone stole the trophies and over $2000 raised for a >> charity (this year was a women's shelter). We're starting to get a fund >> going and several hundred in re-donations have been gathered so far. >> >> But on tbe bright side it was fun, as always. The 1600 ISO of the K10D >> really limits, but a few shots turned out - then I promptly lost the SD card >> so the dozen or so now processed are what we have. >> >> Perennial winner Linda came as the Rice Queen this year, and she didn't >> disappoint, taking the women's race for the third year running: >> >> http://knarfdummyblog.blogspot.ca/2015/03/linda-rice-queen.html?m=1 >> >> Hope you enjoy. Comments welcome. >> >> Cheers, >> >> frank >> -- >> Sent from my Android device with K-9 Mail. Please excuse my brevity. >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- "Sharpness is a bourgeois concept." -Henri Cartier-Bresson -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: test 2
Thanks, Dave. I'll have to try something else since that didn't work. :-) -frank On Sat, Mar 7, 2015 at 1:48 PM, David J Brooks wrote: > nope > > Dave > > On Sat, Mar 7, 2015 at 1:38 PM, frank theriault > wrote: >> How about now? >> >> -- >> "Sharpness is a bourgeois concept." -Henri Cartier-Bresson >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > > > -- > Documenting Life in Rural Ontario. > www.caughtinmotion.com > http://brooksinthecountry.blogspot.com/ > York Region, Ontario, Canada > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- "Sharpness is a bourgeois concept." -Henri Cartier-Bresson -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: test 2
Well, it's obvious that I'm back. Sheesh! LOL -frank On Sat, Mar 7, 2015 at 1:49 PM, Stanley Halpin wrote: > > On Mar 7, 2015, at 1:38 PM, frank theriault wrote: > >> How about now? > > "Now"? How can we know when now is? What is now now will soon be then and > then no, not now. > > stan > >> >> -- >> "Sharpness is a bourgeois concept." -Henri Cartier-Bresson >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- "Sharpness is a bourgeois concept." -Henri Cartier-Bresson -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Sensor size vs. depth of field: explanation of the relationship please
On Sat, Mar 07, 2015 at 11:55:07AM -0500, Mark C wrote: > > The one factor I am ignoring is the "circle of confusion" and effect that > enlarging the image itself has on the DOF of the final print and that is > not something I have never been able to grok and so won't comment on. Maybe > someone else can. > > Mark I consider that to be the most significant factor in the DOF of the final image. Ignore all mystical numbers like format, f stop, focal length, ... for now. The basic problem is you have three defining factors to consider. They are: 1) The size of the subject you are tring to capture 2) The size of the final image you are trying to create 3) How far away from the subject you can place the sensor You can juggle all the other numbers (how much of your sensor does the image cover says how much cropping and magnification you will have to do, etc.), but after a whole lot of maths you end up with one simple result: The size of the "circle of confusion" is basically defined by the actual diameter of the aperture (focal length divided by f stop); all the other numbers cancel out. That's why depth of field increases when you go to a smaller sensor; it's because you generally want to keep the exposure variables (shutter speed and f stop) around the same, and using a smaller camera system means that you can use a physically smaller lens aperture. This reduces the size of the circle of confusion (and thus allows for parts of the subject that are further away from the plane of true focus to still yield images which are perceived as being acceptably within focus; this is another way of saying that the depth of field is increased). -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: test 2
On Mar 7, 2015, at 1:38 PM, frank theriault wrote: > How about now? "Now”? How can we know when now is? What is now now will soon be then and then no, not now. stan > > -- > "Sharpness is a bourgeois concept." -Henri Cartier-Bresson > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: test 2
nope Dave On Sat, Mar 7, 2015 at 1:38 PM, frank theriault wrote: > How about now? > > -- > "Sharpness is a bourgeois concept." -Henri Cartier-Bresson > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- Documenting Life in Rural Ontario. www.caughtinmotion.com http://brooksinthecountry.blogspot.com/ York Region, Ontario, Canada -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
test 2
How about now? -- "Sharpness is a bourgeois concept." -Henri Cartier-Bresson -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
On Mar 7, 2015, at 12:34 PM, Bob Sullivan wrote: > Ann, > Doing Chrome. Just tried again and got it right away. > I often have this problem with your image posts. > (And Cataract surgery in eye #1 went well. Glad to hear this Bob! > It's day 4 and distance vision is getting pretty good. > But I can't read my digital watch, and depth perception is shot. > My 2015 Accura MDX met the garage door opening for $1,800.) Ouch. I suppose you can’t charge that to your medical insurance? stan > Regards, Bob S. > > On Sat, Mar 7, 2015 at 11:26 AM, Ann Sanfedele wrote: >> Bob - what browser are you using? Smugmug doesn't like Internet Explorer.. >> try firefox or chrome >> >> It also may just be a glitch today sorry >> >> If you are on Facebook, the photo is there too >> >> ann >> >> On 3/7/2015 11:31, Bob Sullivan wrote: >>> >>> Ann, That site takes way too long to load. I give up... Regards, Bob S. >>> >>> On Sat, Mar 7, 2015 at 9:51 AM, Ann Sanfedele wrote: A time traveler left this message on First Avenue, in the East Village http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A ann -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. >>> >>> >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO-Argentina 1969
On Mar 7, 2015, at 11:40 AM, Jack Davis wrote: > Enjoyed the well done travel log. Thanks Jack. - On Mar 7, 2015, at 12:23 PM, Ann Sanfedele wrote: > Funny that you used the "time travel" phrase aparently jsut about the time I > posted my Time traveler's message Peso.. > > I had a look and like most the street shots and buildings.. feeling those > hold up as slide-to digital transaltions best - the waterfalls all seem a bit > over exposed… When I scanned, then brought the images into Lightroom, there was some variability in exposure. But most scenes were underexposed by about 2 stops. (And it isn’t about the scanning process - you can tell by looking at the slides that they are too dense. Shoulda’ used a Pentax!) I may have overdone the added exposure on the waterfalls - I was trying to bring up the lush green vegetation to the point where it didn’t come across as a dark mass. > and would be interested to see some of these posted next to your current ones > in a how thing's change or don’t I will do a little bit of this. Unfortunately I did not look at the slides before the trip and thus don’t have more than a couple of shots then-and-now. In general, the city still looks much the same. Different cars and buses on the streets, a couple of areas spruced up to handle higher volumes of tourists. In the countryside and around the Iguazu Falls area, major difference I saw was the existence of paved streets and roads. And walkways today to take viewers close to the falls in lieu of the wooden rowboats we used before. > I take it that is YOU at in the last frame? I (and my first wife) and my parents show up in a few frames. That is indeed a younger me in the last frame. One additional background note - these were shot with my first ever SLR, a Nikkormat I had received for Christmas 7 months earlier. I had two lenses: a 50mm (probably f/2.0) and a 105mm. I haven’t been able to extract the EXIF from the slides to determine which lenses were used for which shot > > Have enjoyed the stuff you showed on facebook from the recent journey a lot. Thanks Ann. And BTW, I do have a few NYC shots from the same era - we went there to visit friends earlier that summer. I’ll scan a couple of those next time I pull the scanner out. > > ann > > On 3/7/2015 10:48, Stanley Halpin wrote: >> I am slowly going through images from my recent Argentina trip, whittling >> down and selecting and processing. Meanwhile, I dove into my archive and >> recovered slides I had shot on a trip to Argentina to visit my parents in >> 1969. So, if you would like to escape the winter that refuses to die, just >> jump aboard my time machine and go back to July, 1969… >> >> http://photos.stanhalpin.com/p543631013 >> >> stan >> > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: March PUG - Revised Gallery
Thanks, Ann! Cheers, Christine > On Mar 7, 2015, at 9:42 AM, Ann Sanfedele wrote: > > Yeah, Brian glad you included them Christine's and Kens.. > > Thank me, too, Christine Great fun! -, but you already know I liked it from > the BW challenge viewing on Facebook :-) > > More on March PUG > Thanks Brian, for your including my "second choice" in your faves.. > (my first choice for myself was a darkside capture) > Ken - love your classic "S" - hmmm gee that looks awfully familiar > seems to me I've seen that in person ;-) (Aside to the multitudes - it is at > Grandfather Mountain, I"m pretty sure.) > > Don - your PESO is terrific, sorry you had not found it in time - perfect for > the theme.. > > I LOVE Mark's "Yellow Curves" -(motocycle part?? ) > > And Jan's Grebe and Dan's Windswept round out my faves (that include DOn's > that didnt get in) but Henk's sensuous tree keeps calling me back for another > look (like both sides of clouds - so much going on there) > > I'm semi-lurking -- got an awful lot of housework and work-work.. but > slapping up a Peso or Geso shortly - since I actually went out and > took some photos this past week.. > > ann > > On 3/6/2015 21:49, Christine Aguila wrote: >> Thanks, Brian and thanks everyone for your kind comments! Much appreciated. > >> Cheers, Christine >> >> >> Sent from my iPad >> >>> On Mar 6, 2015, at 12:28 AM, Brian Walters wrote: >>> >>> G'day all >>> >>> The March PUG has been revised to include Christine's and Ken's submissions >>> which somehow got lost in space. >>> >>> They were worth waiting for!! >>> >>> http://pug.komkon.org/index.html >>> > >>> >>> -- >>> PDML Pentax-Discuss Mail List >>> PDML@pdml.net >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>> follow the directions. >>> >> > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: On March PUG - Revised Gallery
Thanks, Bulent! Kind of you to say so! Cheers, Christine > On Mar 6, 2015, at 2:08 PM, Bulent Celasun wrote: > > My favorites : > > At the Eye Doctor by Christine Aguila > Yellow Curves by Mark Roberts > Windswept by Dan Matyola > > And thank you Jack for finding my contribution noteworthy. > > ... > > Now it is time for my first ever pano! > > Bulent > > - > http://patoloji.gen.tr > http://celasun.wordpress.com/ > http://www.flickr.com/photos/bc_the_path/ > http://photo.net/photodb/user?user_id=2226822 > http://www.pentaxphotogallery.com/artists/bulentcelasun > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
Fantastic! Well seen, Ann! Cheers, Christine > On Mar 7, 2015, at 9:51 AM, Ann Sanfedele wrote: > > A time traveler left this message on First Avenue, in the East Village > > http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A > > ann > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: March pug & the photo I couldn't find
Ah, sorry about that! Well, whatever guy with a name beginning with D shot this, tell him I like it! :-) Seriously, nice one Don! Cheers, Christine > On Mar 7, 2015, at 7:19 AM, Darren Addy wrote: > > Just to be clear, this was Don Guthrie's excellent image, not mine. I > need to modify where I put my reply when quoting to make that more > evident. Sorry Don! > > On Fri, Mar 6, 2015 at 8:51 PM, Christine Aguila > wrote: >> That's really nice, Darren! Cheers, Christine >> >> Sent from my iPad >> >>> On Mar 6, 2015, at 2:26 PM, Darren Addy wrote: >>> >>> That is a very arresting image, Don! I like it a LOT. >>> On Fri, Mar 6, 2015 at 11:46 AM, Donald Guthrie wrote: Great pug as usual. I think I liked Ken, Bob S, and Mark's yellow the best. Anyway I could not find this photo for some reason when I submitted but came across it this AM. I could save it for some other PUG but who knows if I can find it again. https://flic.kr/p/pqZ2z9 -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. >>> >>> >>> >>> -- >>> Life is too short to put up with bad bokeh. >>> >>> -- >>> PDML Pentax-Discuss Mail List >>> PDML@pdml.net >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>> follow the directions. >>> >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > > > -- > Life is too short to put up with bad bokeh. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Ricoh/Pentax interview
Very exciting! Thanks for posting, Stan. Cheers, Christine > On Mar 7, 2015, at 8:32 AM, Stanley Halpin > wrote: > > This may be old news, but just in case… the link below is to an interview of > a Ricoh/Pentax Exec by an Imaging Resource guy. Topics include both general > strategy and specifics on the 645Z (demand has been about twice what was > expected, they can’t keep up), the APS-C line, and the coming Full Frame. > > www.imaging-resource.com/news/2015/03/05/ricoh-interview-placeholder > > stan > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Sensor size vs. depth of field: explanation of the relationship please
Stanley Halpin wrote: >Found it - thanks Mark! I will do a careful read. > >http://theonlinephotographer.typepad.com/the_online_photographer/2009/06/depthoffield-hell.html Here's part 2 of that article: http://theonlinephotographer.typepad.com/the_online_photographer/2009/06/depth-of-field-hellthe-sequel.html -- Mark Roberts - Photography & Multimedia www.robertstech.com -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Linda the "Rice Queen"
Terrific outfit! I can't make out any studs on the tires...? Regards, Bob S. On Sat, Mar 7, 2015 at 11:53 AM, Knarf wrote: > De-lurking for a bit: > > A couple of weeks ago Toronto had it's annual Ice Race, Icycle 2015. A downer > is that someone stole the trophies and over $2000 raised for a charity (this > year was a women's shelter). We're starting to get a fund going and several > hundred in re-donations have been gathered so far. > > But on tbe bright side it was fun, as always. The 1600 ISO of the K10D really > limits, but a few shots turned out - then I promptly lost the SD card so the > dozen or so now processed are what we have. > > Perennial winner Linda came as the Rice Queen this year, and she didn't > disappoint, taking the women's race for the third year running: > > http://knarfdummyblog.blogspot.ca/2015/03/linda-rice-queen.html?m=1 > > Hope you enjoy. Comments welcome. > > Cheers, > > frank > -- > Sent from my Android device with K-9 Mail. Please excuse my brevity. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
You have a great eye, Anne! That is a fun shot. Unless maybe it really is from the future... ;-) Cheers, frank On 7 March, 2015 10:51:53 AM EST, Ann Sanfedele wrote: >A time traveler left this message on First Avenue, in the East Village > >http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A > >ann -- Sent from my Android device with K-9 Mail. Please excuse my brevity. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Scam, OT
On 7 Mar 2015, at 17:05, P.J. Alling wrote: > > Looks like a scam to me. I've been getting calls from "Microsoft" support > lately, a heavily accented, usually Indian, voice, identifies as a member of > their support team to report that my computer has been comprimised with some > kind of Malwear, Could be worse. At least it's not Mal's underwear. B -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO: Fascination
Dan, Brings back nice memories of trips and kids growing up. Regards, Bob S. On Sat, Mar 7, 2015 at 9:55 AM, Daniel J. Matyola wrote: > http://photo.net/photodb/photo?photo_id=17976796 > Comments are invited. > > Dan Matyola > http://www.pentaxphotogallery.com/danieljmatyola > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO: Hitching A Ride
Great shot! In a couple of months the red-necked grebes should be back here and I can't wait: love the grebes! Yours is brilliant. Thanks for sharing. Cheers, frank On 6 March, 2015 7:39:37 PM EST, David Mann wrote: >It's been years since I saw crested grebes and I'd forgotten that they >carry their young on their back. There was a small population because >someone had built some nesting boxes for them on the lake. > >http://gallery.multi.net.nz/photo/881/#peso > >The focus wasn't quite perfect; I need a better camera! > >Cheers, >Dave -- Sent from my Android device with K-9 Mail. Please excuse my brevity. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
GESO - Linda the "Rice Queen"
De-lurking for a bit: A couple of weeks ago Toronto had it's annual Ice Race, Icycle 2015. A downer is that someone stole the trophies and over $2000 raised for a charity (this year was a women's shelter). We're starting to get a fund going and several hundred in re-donations have been gathered so far. But on tbe bright side it was fun, as always. The 1600 ISO of the K10D really limits, but a few shots turned out - then I promptly lost the SD card so the dozen or so now processed are what we have. Perennial winner Linda came as the Rice Queen this year, and she didn't disappoint, taking the women's race for the third year running: http://knarfdummyblog.blogspot.ca/2015/03/linda-rice-queen.html?m=1 Hope you enjoy. Comments welcome. Cheers, frank -- Sent from my Android device with K-9 Mail. Please excuse my brevity. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
Future! J - Original Message - From: "P.J. Alling" To: "Pentax-Discuss Mail List" Sent: Saturday, March 7, 2015 9:09:47 AM Subject: Re: PESO - Time Traveler's Message The question being, is it a time traveler from the past, future or maybe from the present, returning? On 3/7/2015 10:51 AM, Ann Sanfedele wrote: > A time traveler left this message on First Avenue, in the East Village > > http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A > > > > ann > -- I don't want to achieve immortality through my work; I want to achieve immortality through not dying. -- Woody Allen -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
Ann, Doing Chrome. Just tried again and got it right away. I often have this problem with your image posts. (And Cataract surgery in eye #1 went well. It's day 4 and distance vision is getting pretty good. But I can't read my digital watch, and depth perception is shot. My 2015 Accura MDX met the garage door opening for $1,800.) Regards, Bob S. On Sat, Mar 7, 2015 at 11:26 AM, Ann Sanfedele wrote: > Bob - what browser are you using? Smugmug doesn't like Internet Explorer.. > try firefox or chrome > > It also may just be a glitch today sorry > > If you are on Facebook, the photo is there too > > ann > > On 3/7/2015 11:31, Bob Sullivan wrote: >> >> Ann, That site takes way too long to load. I give up... Regards, Bob S. >> >> On Sat, Mar 7, 2015 at 9:51 AM, Ann Sanfedele wrote: >>> >>> A time traveler left this message on First Avenue, in the East Village >>> >>> >>> http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A >>> >>> ann >>> >>> -- >>> PDML Pentax-Discuss Mail List >>> PDML@pdml.net >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>> follow the directions. >> >> > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
From the present returning from the future :-) ann On 3/7/2015 12:09, P.J. Alling wrote: The question being, is it a time traveler from the past, future or maybe from the present, returning? On 3/7/2015 10:51 AM, Ann Sanfedele wrote: A time traveler left this message on First Avenue, in the East Village http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A ann -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
LOL :-) ann On 3/7/2015 11:37, Jack Davis wrote: What you can't see hidden under the snow is, "Message to Jack." Jack (sigh) - Original Message - From: "Ann Sanfedele" To: "Pentax-Discuss Mail List" Sent: Saturday, March 7, 2015 7:51:53 AM Subject: PESO - Time Traveler's Message A time traveler left this message on First Avenue, in the East Village http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A ann -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
Bob - what browser are you using? Smugmug doesn't like Internet Explorer.. try firefox or chrome It also may just be a glitch today sorry If you are on Facebook, the photo is there too ann On 3/7/2015 11:31, Bob Sullivan wrote: Ann, That site takes way too long to load. I give up... Regards, Bob S. On Sat, Mar 7, 2015 at 9:51 AM, Ann Sanfedele wrote: A time traveler left this message on First Avenue, in the East Village http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A ann -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO-Argentina 1969
Funny that you used the "time travel" phrase aparently jsut about the time I posted my Time traveler's message Peso.. I had a look and like most the street shots and buildings.. feeling those hold up as slide-to digital transaltions best - the waterfalls all seem a bit over exposed... and would be interested to see some of these posted next to your current ones in a how thing's change or don't I take it that is YOU at in the last frame? HAVe enjoyed the stuff you showed on facebook from the recent journey a lot. ann On 3/7/2015 10:48, Stanley Halpin wrote: I am slowly going through images from my recent Argentina trip, whittling down and selecting and processing. Meanwhile, I dove into my archive and recovered slides I had shot on a trip to Argentina to visit my parents in 1969. So, if you would like to escape the winter that refuses to die, just jump aboard my time machine and go back to July, 1969… http://photos.stanhalpin.com/p543631013 stan -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Ricoh/Pentax interview
Thanks Stan, I hadn't read that before. Bob S. On Sat, Mar 7, 2015 at 8:32 AM, Stanley Halpin wrote: > This may be old news, but just in case… the link below is to an interview of > a Ricoh/Pentax Exec by an Imaging Resource guy. Topics include both general > strategy and specifics on the 645Z (demand has been about twice what was > expected, they can’t keep up), the APS-C line, and the coming Full Frame. > > www.imaging-resource.com/news/2015/03/05/ricoh-interview-placeholder > > stan > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Scam, OT
I have gotten phone calls like yours but never this big red warning sign on the computer. I figured it was a scam but did some searching. Not sure ho wit got on my computer. only email i opend was from the toronto bluejays store looking at hats, Dave On Sat, Mar 7, 2015 at 12:04 PM, P.J. Alling wrote: > Looks like a scam to me. I've been getting calls from "Microsoft" support > lately, a heavily accented, usually Indian, voice, identifies as a member of > their support team to report that my computer has been comprimised with some > kind of Malwear, funny how they can do that through my firewall. Playing > along a bit it's like a mind reading act, they ask suggestive questions and > have you look at your error logs, (which are always full of warnings and > errors), the big finish being when they ask for remote control of your > system. When I tell them that I'm a Microsoft certified professional and > didn't make a support request, they hang up, disappearing faster than a > vampire seeing a cross. > > On 3/7/2015 9:46 AM, David J Brooks wrote: >> >> This message popped up on my screen this morning with a recorded >> message say i needed to call this number my iMac may have these >> viruses on it. >> >> http://www.caughtinmotion.com/images/scam.jpg >> >> I am doing some google searches on this and it looks like a scam or >> phishing expedition, am i correct. I will be running my mac scan >> program shortly anyway >> >> Dave >> > > > -- > I don't want to achieve immortality through my work; I want to achieve > immortality through not dying. > -- Woody Allen > > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. -- Documenting Life in Rural Ontario. www.caughtinmotion.com http://brooksinthecountry.blogspot.com/ York Region, Ontario, Canada -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
The question being, is it a time traveler from the past, future or maybe from the present, returning? On 3/7/2015 10:51 AM, Ann Sanfedele wrote: A time traveler left this message on First Avenue, in the East Village http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A ann -- I don't want to achieve immortality through my work; I want to achieve immortality through not dying. -- Woody Allen -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Scam, OT
Looks like a scam to me. I've been getting calls from "Microsoft" support lately, a heavily accented, usually Indian, voice, identifies as a member of their support team to report that my computer has been comprimised with some kind of Malwear, funny how they can do that through my firewall. Playing along a bit it's like a mind reading act, they ask suggestive questions and have you look at your error logs, (which are always full of warnings and errors), the big finish being when they ask for remote control of your system. When I tell them that I'm a Microsoft certified professional and didn't make a support request, they hang up, disappearing faster than a vampire seeing a cross. On 3/7/2015 9:46 AM, David J Brooks wrote: This message popped up on my screen this morning with a recorded message say i needed to call this number my iMac may have these viruses on it. http://www.caughtinmotion.com/images/scam.jpg I am doing some google searches on this and it looks like a scam or phishing expedition, am i correct. I will be running my mac scan program shortly anyway Dave -- I don't want to achieve immortality through my work; I want to achieve immortality through not dying. -- Woody Allen -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Sensor size vs. depth of field: explanation of the relationship please
I studied up on this years ago when I got started in macro photography. The Kodak Worships series book on close up photography has an excellent chapter that describes the theory of dof and gives the formula to calculate it. I think John Shaw covered it in earlier film era versions of his "Close UPs In Nature" Basically, in theory DOF is driven by the lens f stop setting and the magnification of the subject. Focal length and format are not directly involved in DOF but obviously longer focal length may mean greater magnification and the magnification (reproduction ratio) of larger formats is higher. If you fill the frame of a Q, a 35mm, and a 6x7 with a 35mm wide subject the magnification ratios are roughly 1:5, 1:1, 2:1 - ie. from 1/5th lifesized to 2x lifesized. Magnification goes up, DOF gets more shallow. In theory, if you take a 1:1 magnification image with a Q, a 35mm and a 6x7 the depth of field in each image is the same, but obviously the crop of each image is completely different with the Q showing something only about 5mm wide and the 6x7 showing something about 7cm wide. I tested this extensively with 35mm great and determined that at the same magnification and f stop setting images taken with a 50mm, 100mm and 200mm at the same f stop setting. Of course, in fact, the images were basically identical but the distance between the camera and subject varied considerably. The one factor I am ignoring is the "circle of confusion" and effect that enlarging the image itself has on the DOF of the final print and that is not something I have never been able to grok and so won't comment on. Maybe someone else can. Mark On 3/7/2015 10:32 AM, Stanley Halpin wrote: Bulent’s recent question about a possible foray into large-format film photography, primarily for macro shots, yielded several comments about how one gets a shallower depth of field with Large Format (LF). I seen that, heard that before. One or more of the 645z reviews I’ve seen made a big deal about how the medium format (MF) niche was crippled if not doomed by the inherently shallow depth of field. I remember in the early days of APS-C and smaller sensors, some were moaning about the difficulty of getting shallow enough depth of field. OK, so it seems that the general consensus is that moving from LF to MF to FF to APS-C to smaller sensor carries with it a corresponding increase in depth of field. But what does this mean? Really? I understand that lenses with longer focal lengths have shallower depths of field. So a 75mm lens will have shallower depth of field than a 50mm. And I understand that a 75mm lens on a 645 format will have the same effective field of view as a 50mm on a FF 35mm format. Is this why the larger formats are considered to have shallower depth of field? Because I need to use a longer lens to achieve the same field of view? What if I had a 100mm macro lens that could be adapted to fit on the 645z and a K-mount FF and a K-mount APS-C. Since the lens and its focal length are constant, does the depth of field remain constant, with only the effective field of view changing? Or does the depth of field also change? In short, I think my question is whether the accepted relationship [LF & MF = shallower depth of field] really has anything to do with the sensor format. I am guessing that people are talking about a practical issue (need to use longer lenses to get the same field of view on a LF) rather than a physical issue of the interaction between sensor size and lens. But I can’t tell... stan --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Sensor size vs. depth of field: explanation of the relationship please
Found it - thanks Mark! I will do a careful read. http://theonlinephotographer.typepad.com/the_online_photographer/2009/06/depthoffield-hell.html stan On Mar 7, 2015, at 11:38 AM, Mark Roberts wrote: > Bob Sullivan wrote: > >> Stan, >> The Physics escapes me right now, but maybe Mark Cassino will chime in. >> He really drove home the point some time ago when he talked about >> using a tiny sensor P&S for bugs. > > Ctein explained this in a couple of columns on the Online > Photographer. Try searching there and you'll come up with the > information. > > -- > Mark Roberts - Photography & Multimedia > www.robertstech.com > > > > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO-Argentina 1969
Enjoyed the well done travel log. Thanks, Stan! Jack - Original Message - From: "Stanley Halpin" To: "Pentax-Discuss Mail List" Sent: Saturday, March 7, 2015 7:48:24 AM Subject: GESO-Argentina 1969 I am slowly going through images from my recent Argentina trip, whittling down and selecting and processing. Meanwhile, I dove into my archive and recovered slides I had shot on a trip to Argentina to visit my parents in 1969. So, if you would like to escape the winter that refuses to die, just jump aboard my time machine and go back to July, 1969… http://photos.stanhalpin.com/p543631013 stan -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Sensor size vs. depth of field: explanation of the relationship please
Bob Sullivan wrote: >Stan, >The Physics escapes me right now, but maybe Mark Cassino will chime in. >He really drove home the point some time ago when he talked about >using a tiny sensor P&S for bugs. Ctein explained this in a couple of columns on the Online Photographer. Try searching there and you'll come up with the information. -- Mark Roberts - Photography & Multimedia www.robertstech.com -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
What you can't see hidden under the snow is, "Message to Jack." Jack (sigh) - Original Message - From: "Ann Sanfedele" To: "Pentax-Discuss Mail List" Sent: Saturday, March 7, 2015 7:51:53 AM Subject: PESO - Time Traveler's Message A time traveler left this message on First Avenue, in the East Village http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A ann -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO - Time Traveler's Message
Ann, That site takes way too long to load. I give up... Regards, Bob S. On Sat, Mar 7, 2015 at 9:51 AM, Ann Sanfedele wrote: > A time traveler left this message on First Avenue, in the East Village > > http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A > > ann > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Sensor size vs. depth of field: explanation of the relationship please
Stan, The Physics escapes me right now, but maybe Mark Cassino will chime in. He really drove home the point some time ago when he talked about using a tiny sensor P&S for bugs. Regards, Bob S. On Sat, Mar 7, 2015 at 9:32 AM, Stanley Halpin wrote: > Bulent’s recent question about a possible foray into large-format film > photography, primarily for macro shots, yielded several comments about how > one gets a shallower depth of field with Large Format (LF). I seen that, > heard that before. One or more of the 645z reviews I’ve seen made a big deal > about how the medium format (MF) niche was crippled if not doomed by the > inherently shallow depth of field. I remember in the early days of APS-C and > smaller sensors, some were moaning about the difficulty of getting shallow > enough depth of field. > > OK, so it seems that the general consensus is that moving from LF to MF to FF > to APS-C to smaller sensor carries with it a corresponding increase in depth > of field. > > But what does this mean? Really? > > I understand that lenses with longer focal lengths have shallower depths of > field. So a 75mm lens will have shallower depth of field than a 50mm. > And I understand that a 75mm lens on a 645 format will have the same > effective field of view as a 50mm on a FF 35mm format. Is this why the larger > formats are considered to have shallower depth of field? Because I need to > use a longer lens to achieve the same field of view? > > What if I had a 100mm macro lens that could be adapted to fit on the 645z and > a K-mount FF and a K-mount APS-C. Since the lens and its focal length are > constant, does the depth of field remain constant, with only the effective > field of view changing? Or does the depth of field also change? > > In short, I think my question is whether the accepted relationship [LF & MF = > shallower depth of field] really has anything to do with the sensor format. I > am guessing that people are talking about a practical issue (need to use > longer lenses to get the same field of view on a LF) rather than a physical > issue of the interaction between sensor size and lens. But I can’t tell... > > stan > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO: Hitching A Ride
Sweet! I've seen that IRL - seems to me there are some others that do that too - I'm thinking I've seen loons with a baby piggybacking ann On 3/6/2015 19:39, David Mann wrote: It's been years since I saw crested grebes and I'd forgotten that they carry their young on their back. There was a small population because someone had built some nesting boxes for them on the lake. http://gallery.multi.net.nz/photo/881/#peso The focus wasn't quite perfect; I need a better camera! Cheers, Dave -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
PESO: Fascination
http://photo.net/photodb/photo?photo_id=17976796 Comments are invited. Dan Matyola http://www.pentaxphotogallery.com/danieljmatyola -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO 2015 - 023 - GDG
Yeah - nice one! a theme I'm especially fond of - there is something about empty chairs... ann On 3/6/2015 12:10, Godfrey DiGiorgi wrote: At the Dana Street cafe yesterday, the chill left the outdoor tables empty until the day warmed a touch… https://flic.kr/p/rsuayd enjoy, Godfrey --- "The fact that nobody understands you doesn't make you an artist." -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
PESO - Time Traveler's Message
A time traveler left this message on First Avenue, in the East Village http://annsan.smugmug.com/On-the-Road-or-On-Foot/2015-and-all-that/i-k6MggcF/A ann -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
GESO-Argentina 1969
I am slowly going through images from my recent Argentina trip, whittling down and selecting and processing. Meanwhile, I dove into my archive and recovered slides I had shot on a trip to Argentina to visit my parents in 1969. So, if you would like to escape the winter that refuses to die, just jump aboard my time machine and go back to July, 1969… http://photos.stanhalpin.com/p543631013 stan -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: March PUG - Revised Gallery
Yeah, Brian glad you included them Christine's and Kens.. Thank me, too, Christine Great fun! -, but you already know I liked it from the BW challenge viewing on Facebook :-) More on March PUG Thanks Brian, for your including my "second choice" in your faves.. (my first choice for myself was a darkside capture) Ken - love your classic "S" - hmmm gee that looks awfully familiar seems to me I've seen that in person ;-) (Aside to the multitudes - it is at Grandfather Mountain, I"m pretty sure.) Don - your PESO is terrific, sorry you had not found it in time - perfect for the theme.. I LOVE Mark's "Yellow Curves" -(motocycle part?? ) And Jan's Grebe and Dan's Windswept round out my faves (that include DOn's that didnt get in) but Henk's sensuous tree keeps calling me back for another look (like both sides of clouds - so much going on there) I'm semi-lurking -- got an awful lot of housework and work-work.. but slapping up a Peso or Geso shortly - since I actually went out and took some photos this past week.. ann On 3/6/2015 21:49, Christine Aguila wrote: Thanks, Brian and thanks everyone for your kind comments! Much appreciated. Cheers, Christine Sent from my iPad On Mar 6, 2015, at 12:28 AM, Brian Walters wrote: G'day all The March PUG has been revised to include Christine's and Ken's submissions which somehow got lost in space. They were worth waiting for!! http://pug.komkon.org/index.html -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Sensor size vs. depth of field: explanation of the relationship please
Bulent’s recent question about a possible foray into large-format film photography, primarily for macro shots, yielded several comments about how one gets a shallower depth of field with Large Format (LF). I seen that, heard that before. One or more of the 645z reviews I’ve seen made a big deal about how the medium format (MF) niche was crippled if not doomed by the inherently shallow depth of field. I remember in the early days of APS-C and smaller sensors, some were moaning about the difficulty of getting shallow enough depth of field. OK, so it seems that the general consensus is that moving from LF to MF to FF to APS-C to smaller sensor carries with it a corresponding increase in depth of field. But what does this mean? Really? I understand that lenses with longer focal lengths have shallower depths of field. So a 75mm lens will have shallower depth of field than a 50mm. And I understand that a 75mm lens on a 645 format will have the same effective field of view as a 50mm on a FF 35mm format. Is this why the larger formats are considered to have shallower depth of field? Because I need to use a longer lens to achieve the same field of view? What if I had a 100mm macro lens that could be adapted to fit on the 645z and a K-mount FF and a K-mount APS-C. Since the lens and its focal length are constant, does the depth of field remain constant, with only the effective field of view changing? Or does the depth of field also change? In short, I think my question is whether the accepted relationship [LF & MF = shallower depth of field] really has anything to do with the sensor format. I am guessing that people are talking about a practical issue (need to use longer lenses to get the same field of view on a LF) rather than a physical issue of the interaction between sensor size and lens. But I can’t tell... stan -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Correction
On 07/03/2015 9:09 AM, CollinB wrote: That should have been "test" To late. I suspect that your typo is going to get milked for a certain amount of college humor. bill -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Correction
That should have been "test" -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Scam, OT
On Sat, Mar 7, 2015 at 10:00 AM, Bill wrote: > On 07/03/2015 8:46 AM, David J Brooks wrote: >> >> This message popped up on my screen this morning with a recorded >> message say i needed to call this number my iMac may have these >> viruses on it. >> >> http://www.caughtinmotion.com/images/scam.jpg >> >> I am doing some google searches on this and it looks like a scam or >> phishing expedition, am i correct. I will be running my mac scan >> program shortly anyway >> >> Dave >> > http://deletemalware.blogspot.ca/2014/06/1855-207-5505-warning-your-computer-may.html > > http://malwaretips.com/blogs/systembrowsing-com-removal/ > > Carry in like as if nothing happened, but stop browsing Japanese porn > websites. I'll try Dave > > bill > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. -- Documenting Life in Rural Ontario. www.caughtinmotion.com http://brooksinthecountry.blogspot.com/ York Region, Ontario, Canada -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Question on large format
On 07/03/2015 9:02 AM, Stanley Halpin wrote: On Mar 7, 2015, at 9:51 AM, CollinB wrote: Macro is doable with 4x5 and the right body. You will need a bag bellows and a lens designed for close focus such as a Ysaron. Also, good front movements will allow you to do things on film that would otherwise require Photoshop. Focus gets critical here. Since film sits loosely in holders very close work often is slightly off. You may have to test your holder/gg accuracy with a few extra teat shots in advance. — Sometimes getting extremely close to the subject isn’t all that bad. It can create a moo'd bill -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Question on large format
On Mar 7, 2015, at 9:51 AM, CollinB wrote: > Macro is doable with 4x5 and the right body. You will need a bag bellows and > a lens designed for close focus such as a Ysaron. Also, good front movements > will allow you to do things on film that would otherwise require Photoshop. > Focus gets critical here. Since film sits loosely in holders very close work > often is slightly off. You may have to test your holder/gg accuracy with a > few extra teat shots in advance. > — Sometimes getting extremely close to the subject isn’t all that bad. stan -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Question on large format
On 07/03/2015 8:53 AM, Matthew Hunt wrote: On Sat, Mar 7, 2015 at 9:51 AM, CollinB wrote: You may have to test your holder/gg accuracy with a few extra teat shots in advance. Well, if that's what it takes... It is close up photography after all. bill -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Scam, OT
On 07/03/2015 8:46 AM, David J Brooks wrote: This message popped up on my screen this morning with a recorded message say i needed to call this number my iMac may have these viruses on it. http://www.caughtinmotion.com/images/scam.jpg I am doing some google searches on this and it looks like a scam or phishing expedition, am i correct. I will be running my mac scan program shortly anyway Dave http://deletemalware.blogspot.ca/2014/06/1855-207-5505-warning-your-computer-may.html http://malwaretips.com/blogs/systembrowsing-com-removal/ Carry in like as if nothing happened, but stop browsing Japanese porn websites. bill -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Question on large format
On Sat, Mar 7, 2015 at 9:51 AM, CollinB wrote: > You may have to test your holder/gg accuracy with a few extra teat shots in > advance. Well, if that's what it takes... -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Question on large format
Macro is doable with 4x5 and the right body. You will need a bag bellows and a lens designed for close focus such as a Ysaron. Also, good front movements will allow you to do things on film that would otherwise require Photoshop. Focus gets critical here. Since film sits loosely in holders very close work often is slightly off. You may have to test your holder/gg accuracy with a few extra teat shots in advance. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Scam, OT
This message popped up on my screen this morning with a recorded message say i needed to call this number my iMac may have these viruses on it. http://www.caughtinmotion.com/images/scam.jpg I am doing some google searches on this and it looks like a scam or phishing expedition, am i correct. I will be running my mac scan program shortly anyway Dave -- Documenting Life in Rural Ontario. www.caughtinmotion.com http://brooksinthecountry.blogspot.com/ York Region, Ontario, Canada -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: PESO 2015 - 023 - GDG
Thank you! G > On Mar 7, 2015, at 3:17 AM, Attila Boros wrote: > > Interesting furniture with nice curved lines, it has an organic feel. > I like how you processed this, very nice tones. > > On Fri, Mar 6, 2015 at 7:10 PM, Godfrey DiGiorgi > wrote: >> At the Dana Street cafe yesterday, the chill left the outdoor tables empty >> until the day warmed a touch… >> >> https://flic.kr/p/rsuayd -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Ricoh/Pentax interview
This may be old news, but just in case… the link below is to an interview of a Ricoh/Pentax Exec by an Imaging Resource guy. Topics include both general strategy and specifics on the 645Z (demand has been about twice what was expected, they can’t keep up), the APS-C line, and the coming Full Frame. www.imaging-resource.com/news/2015/03/05/ricoh-interview-placeholder stan -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: March pug & the photo I couldn't find
Just to be clear, this was Don Guthrie's excellent image, not mine. I need to modify where I put my reply when quoting to make that more evident. Sorry Don! On Fri, Mar 6, 2015 at 8:51 PM, Christine Aguila wrote: > That's really nice, Darren! Cheers, Christine > > Sent from my iPad > >> On Mar 6, 2015, at 2:26 PM, Darren Addy wrote: >> >> That is a very arresting image, Don! I like it a LOT. >> >>> On Fri, Mar 6, 2015 at 11:46 AM, Donald Guthrie >>> wrote: >>> Great pug as usual. I think I liked Ken, Bob S, and Mark's yellow the best. >>> >>> Anyway I could not find this photo for some reason when I submitted but came >>> across it this AM. I could save it for some other PUG but who knows if I can >>> find it again. >>> >>> >>> https://flic.kr/p/pqZ2z9 >>> >>> -- >>> PDML Pentax-Discuss Mail List >>> PDML@pdml.net >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>> follow the directions. >> >> >> >> -- >> Life is too short to put up with bad bokeh. >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. >> > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- Life is too short to put up with bad bokeh. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
