F-stop questionCalculate the area of your aperture (pi x radius squared).
Calculate the area of an f22 aperture at 50mm (50mm divided by 22 =diameter.
Area =(1/2diameter)(1/2diameter) x pi. Divide the area of your aperture into
the area of f22. The result equals 40. Multiply f22 metered exposure
://idea.uwosh.edu/nick/pinholephoto.htm and finding the
link there. Then right click on it, and click on save target as. That
will save it to your hard drive, and you should be able to open it with
acrobat reader from there.
John
- Original Message -
From: Bill Erickson erick...@hickorytech.net
I can't get the document to open.
- Original Message -
From: Nick Dvoracek dvora...@vaxa.cis.uwosh.edu
To: pinhole-discussion@p at ???
Sent: Thursday, February 20, 2003 4:45 PM
Subject: [pinhole-discussion] D'Arcy Power article on-line
A while ago there was a thread about an
You're biting off a very big chunk. Taking on a new method, thirty day time
limit and very large prints. I've tried most of them, and I think that the
easiest and most foolproof is cyanotype. you will need large format contact
negs for any of these anyway. Cyanotype exposure can be maddening in
I've never found a book that I thought told me very much. A friend likes
Photoshop Restoration and Retouching. It's really pretty intuitive, once
you grasp the parallels with the wet darkroom.
- Original Message -
From: Peter Wiklund peter.wikl...@journalistgruppen.se
To:
I found that with incandescent light and no filtration I was quite happy
with the color balance, with a speed of about 2.5 I used an 85A outdoors at
speed of 1.75 but I didn't like the color balance. I developed in JOBO,
which worked fine. A friend did a lot of these at or near sunset, i.e.,
Well put. I'll briefly share a similar experience.I had wondered what sort
of images I might get with spontaneous pinholes, naturally occuring small
apertures. I took a cardboard box 20 long, taped 8x10 paper inside one end,
cut an opening in the other and attached a Ritz soda cracker over the
Thanks. This reply will be a test.
- Original Message -
From: James Kellar ja...@kellar.com
To: pinhole-discussion@p at ???
Sent: Saturday, January 11, 2003 1:34 PM
Subject: Re: [pinhole-discussion] duplicate messages
The address has been deleted from the database. This should
Can't do it. Both come back with the current e-mail address.
- Original Message -
From: George L Smyth glsm...@yahoo.com
To: pinhole-discussion@p at ???
Sent: Saturday, January 11, 2003 8:14 AM
Subject: Re: [pinhole-discussion] duplicate messages
I would think that you should
Another thing occurs to me. The camera analogy is also limited by the fact
that camera shutters open and close, while light streams into the human eye
continuously. The operative 'shutter speed would have to be the duration of
exposure to the rod or cone required to trigger nerve conduction. I
Here is some information I have. How it applies I'm not sure. The eye is
only the aperture, lens and sensing apparatus. Because the eye is attached
to the brain it would make more sense to use a digital camera as a model
rather than film camera. The mind can read an image and give a response in
as
I'll defend a 1 Fl on 4x5. The first camera I ever built had 0.75 Fl and
I've had great fun with it. It has a wonderfully wide acceptance angle and
makes a nice round image on 4x5 film. Placed 0.75 inches away from the
object it gives a life size image.
- Original Message -
From: Michael
You can either get closer to your composition, or choose a neutral
background, or selectively light your composition and leave the background
darker. Or you can burn in the background during printing.
- Original Message -
From: Mark Andrews mandr...@dragonbones.com
To: pinhole-discussion@p
Here is another interpretation of digital pinhole. I made this image using a
tiny hole in a cracker served at the artist's reception for a digital
photography show I'm in. Had to keep my priorities straight.
www.???/discussion/upload/gallery2002.php?pic=digital_copy.jp
g
Cracker attached over
Thanks for the information. Eric Renner calls people like us techno-nerds.
But I know for a fact that he knows all this stuff too but won't admit it.
- Original Message -
From: Guillermo pen...@rogers.com
To: pinhole-discussion@p at ???
Sent: Wednesday, December 11, 2002 9:43 PM
It occurs to me that lack of sharpness in pinhole images is not inherent to
the nature of diffraction photography. It is caused by lack of precision in
matching the diameter of the pinhole to the distance to the film, or in less
than perfect pinholes. Thus it could be said to be a lovable blemish
I used a pinhole bodycap on my nikon D1X. You can calibrate the exposures by
just looking at the LCD and trying again. All in all I didn't like the
process or the results. It seemed like too much horsing around with
machinery, and the acceptance angle is pretty narrow.
- Original Message -
I had some of the same thoughts. But one can't be a Luddite about it. The
Luddites invented sabotage, throwing their wooden shoes (sabots) into the
newly invented machinery which they believed would destroy work as they knew
it. The digital darkroom gives much to the process of creativity. It
Just an intuitive guess, but the times sound a little on the short side. For
night exposures, I expose from a half hour after sunset until a half hour
before sunrise. Gives decent shadow detail without washing evrything out.
- Original Message -
From: Philip willarney pwillar...@yahoo.com
yes, the primer is your problem. There's nothing for the chemical to soak
into. Anybody know of something he can put on it?
- Original Message -
From: dennis vinciguerra vinciguer...@compuserve.com
To: pinhole-discussion@p at ???
Sent: Tuesday, November 26, 2002 8:05 PM
Subject:
There's been quite a bit of talk about digitally produced contact negatives
lately. so I thought I would share a strategy that seems to work well. Start
with a grey scale positive. There are two ways to increase contrast and
promote adequate density in the negative. One is to raise the middle
Burkholters book recommends, and I heartily agree, using Pictorico brand
overhead transparency sheets. They are a good deal more expensive than
ordinary ones, but they seem to be the only ones that hold the ink well
enough to build density. Search for Pictrico on the web and you'll find
it. They
I bet it will be Ok. I've used really 'shallow digital negs for platinum,
with good results, requiring very short exposure times.
- Original Message -
From: D. Hill zopp...@yahoo.com
To: pinhole-discussion@p at ???
Sent: Monday, November 18, 2002 10:08 PM
Subject: [pinhole-discussion]
There's a set of llustrations somewhere around page 120 in Eric renner's
book that illustrates the effevct of different pinhole size at the same
distance from the image. Very few people so far as I know have deliberately
ventured toward the too small size.
- Original Message -
From: John
I settled on 2.5 indoors an 1.5 outdoors, which turned out to be fairly
satisfactory. The outdoors with 85a filter did,t result in colors I liked.
Mark Dungan has done a lot of this and likes shooting outdoors just before
sunset, which probably improves the color balance.
- Original Message
You should get full coverage of a 6x6 negative with the focal length you
mentioned. I'd agree that the problem is most likely physical
obstruction.- Original Message -
From: Fox, Robert r...@aarp.org
To: pinhole-discussion@p at ???
Sent: Tuesday, November 12, 2002 2:04 PM
Subject: RE:
Thanks for the comment. I thought it was good too. Most folks like Ilford
paper. No, the kodak printing doesn't always come through, but you never can
tell. most folks use an ISo of 5 for starters. I've always used RC.
- Original Message -
From: Andrew Amundsen a...@tcinternet.net
To:
Procolor in Minneapol;is will do this for color, I don't know about BW.
it's www.procolor.com
- Original Message -
From: Nick Dvoracek dvora...@vaxa.cis.uwosh.edu
To: pinhole-discussion@p at ???
Sent: Monday, November 04, 2002 9:07 AM
Subject: [pinhole-discussion] Silver prints from
It seems to me that what you are describing is spaces with a history, and a
funky history at that. The remembrance of things past, to steal a phrase.
- Original Message -
From: Steve Bell veracity...@earthlink.net
To: Pinhole List pinhole-discussion@p at ???
Sent: Monday, October 28,
My message went through. Here is my reply. If it goes through, the HTML
clearly comes from someone else.
- Original Message -
From: erick...@hickorytech.net
To: ppinhole discussion pinhole-discussion@p at ???
Sent: Wednesday, October 23, 2002 7:36 AM
Subject: [pinhole-discussion]
Readyloads. See at www.calumetphoto.com
- Original Message -
From: Catherine Just blue_medic...@yahoo.com
To: pinhole-discussion@p at ???
Sent: Wednesday, October 16, 2002 11:56 AM
Subject: [pinhole-discussion] 4x5 film
hi,
after using 4x5 film holders with my pinhole while
I think I remember that the general technical term for the phenomenon we're
talking about is piezoelectric.
- Original Message -
From: Tom Miller twmil...@mr.net
To: pinhole-discussion@p at ???
Sent: Wednesday, October 16, 2002 8:57 AM
Subject: Re: [pinhole-discussion] 1: Is This Nuts?
I suspect that this is the same sort of green light one sees when pulling
the tape that holds 120 film to the roll off. For some reason, it never
seems to affect the film. There's a technical name for it, but I don't know
it. Maybe it's something like the green light you can get when biting down
They're fine. See also the ones sold by pinhole resource
www.pinholeresource.com. Also fine. - Original Message -
From: Fox, Robert r...@aarp.org
To: pinhole-discussion@p at ???
Sent: Monday, October 14, 2002 8:08 AM
Subject: [pinhole-discussion] Laser drilled pinholes from Calumet?
Yes, there is a pinhole diameter that will give best sharpness for each
distance from pinhole to film. The simplest version of the formula is
(distance to film in inches)(55) equals the square of the optimal diameter
in thousandths of an inch. In your case (1.12 inches)(55) equals 68.99, the
The issue is the degree of enlargement. Enlarging 35mm to 4x6 increases the
image area 16 times. Increasing a 4x5 to 16x20 increases the area only 4
times. You still get best results by contact printing, which is also true
with lens images. - Original Message -
From: Uptown Gallery
The big advantage of paper is that it can be handled under a safelight.
Don't fret about it's tonal range etc, it's a great learning tool. I'd guess
that the biggest argument in favor of 4x5 ids the greater fariety of films,
film holders, varieties of cameras that can be adapted, etc. Also, not
Since you are an adventurer re pinholes, I'll pass on an idea I've been
playing with. Spontaneous pinholes. Small apertures like the little holes in
soda crackers, or arrays as in the tops of salt shakers make for wonderfully
rewarding experiments.
- Original Message -
From: Marcy Merrill
The blue haze is what you clear. try it.
- Original Message -
From: Catherine Just blue_medic...@yahoo.com
To: pinhole-discussion@p at ???
Sent: Monday, September 16, 2002 12:14 AM
Subject: Re: [pinhole-discussion] Heading to England
thank you.
I actually have some 4x5 film
I never had any trouble just letting the negative dry out in the field and
then clearing it when I got home. Also, one can, if desperate, clear the
negative just with water. It leaves the negative a good deal more vulnerable
to scratching, though.
- Original Message -
From:
No experience with the duolab, but I can sure endorse Jobo. - Original
Message -
From: D. Hill
To: pinhole-discussion@p at ???
Sent: Saturday, August 31, 2002 9:34 AM
Subject: [pinhole-discussion] Does anyone use a Jobo for processing
Hi everyone,
After all this
These are great negs, especially with the pictorico film. Dan Burkholders
book Making Digital negatives for contact printing will tell you how to do
it.
- Original Message -
From: Christian Harkness christianharkn...@hotmail.com
To: pinhole-discussion@p at ???
Sent: Wednesday, August
1. The optimal distance for a .013 pinhole is about three inches, and the f
stop would be about 230. You should be able to figure your exposure out with
that, by comparing with a metered f stop. A black cat brand guide will
help enormously. see it at www.pinholeresource.com
2. Technical answer is
And the optimal pinhole diamter will be 0.010 inches.
- Original Message -
From: Rune Tallaksen tall...@alfanett.no
To: Pinhole-Discussion-Admin pinhole-discussion@p at ???
Sent: Friday, August 16, 2002 1:23 PM
Subject: [pinhole-discussion] Pinhole mounted in bodycap on EOS cameras
You must have obstructed the pinhole somehow, or else you are loading your
film backside forward and are exposing through the film. One time I taped
the pinhole inside the camera and only then sprayed the inside with black
paint.
- Original Message -
From: callum moffat callum...@yahoo.com
One way to test for unperceived leaks is to cover the whole camera with a
black plastic garbage bag, leaving only the pinhole showing. the repeat the
exposure situation.
- Original Message -
From: ROBERTSON,TRAVIS J is-...@womans.com
To: pinhole-discussion@p at ???
Sent: Tuesday,
I just spent a week helping a friend load his new multiformat zero etc. What
a pain! As for 4x5 vs 8x10, 4x5 gives you a lot more choices. 8x10 satisfies
the purist. Look at choices at www.pinholeresource.com.
- Original Message -
From: Fox, Robert r...@aarp.org
To: Pinhole List (E-mail)
And you can make the camera narrower than the paper, curving the paper to
fit and thus greatly increasing your angle of view.
- Original Message -
From: George L Smyth glsm...@yahoo.com
To: pinhole-discussion@p at ???
Sent: Wednesday, August 07, 2002 3:18 PM
Subject: RE:
If you look on page 120 in Eric Renner's first edition or 128 in the second
edition you will see an array of progressively more blurred images of the
same object along with the f stop of the pinhole. The pinhole in the lower
right corner seems optimal. The pinhole directly above it is more than
Go gett'em! Go buy Eric Renner's book Pinhole Photography, second edition.
It'll get you started and then some.
- Original Message -
From: ROBERTSON,TRAVIS J is-...@womans.com
To: pinhole-discussion@p at ???
Sent: Thursday, July 25, 2002 4:30 PM
Subject: [pinhole-discussion] I have a
You can, but most strobes don't put out enough light to give adequate
exposure with just one shot. Using a flash meter, find the distance from the
object that gives you an F22 reading, then find the multiple of f22 your
pinhole needs and give that many shots with the strobe.
- Original Message
One simple way is to photograph the pinhole over a light box with a ruler
beside it, then enlarge the negative as big as you can and compare the
diamter of.the aperture with distance on the ruler. Comparators for threads
are said to work fairly well. I bought a set of pre-drilled pinholes and use
I use the same formula as I do for TMAX. The other forgiving factor is that
when you correct for reciprocity failure, the failure itself buffers
overexposure risk. Don't try to hit a mark too closely. Overexposure may be a
wrong, but it's only a misdemeanor. Underexposure is a felony.
-
- Original Message -
From: William Erickson erick...@hickorytech.net
To: ppinhole discussion pinhole-discussion@p at ???
Sent: Friday, July 19, 2002 1:52 PM
Subject: [pinhole-discussion] pinhole size
I misspoke this morning when i sent a comment about the relationship
between
pinhole size
I misspoke this morning when i sent a comment about the relationship between
pinhole size and sharpness. I indicted that exposure doubles with every 40%
increase in diamter. It should have been the area of the aperture doubles,
and thus time halves.
I am attempting to recover from a deep seated addiction to commercially
drilled pinholes. My research yields the following, which I will share
because I have never seen it written anywhere before. Exposure time for any
given pinhole doubles with each 40% increase in diameter, but sharpness of
I have a Nikon Coolscan and could scan them for you and put the files on a
CD. You'ld have to trust me with the slides. erick...@hickorytech.net
- Original Message -
From: Chris Peregoy pere...@umbc.edu
To: pinhole-discussion pinhole-discussion@p at ???
Sent: Saturday, July 13, 2002
of
Shap's
Bal. Bitzper liter of working developer. It's now available through the
Photographers' Formulary.
S
- Original Message -
From: William Erickson erick...@hickorytech.net
To: pinhole-discussion@p at ???
Sent: Friday, July 12, 2002 7:29 AM
Subject: Re: [pinhole-discussion] Why
to not using a filter. But, if you use
Ilford paper, its speed is higher at lower contrast grades than at
higher contrast. As for me, I use ISO 4 when I shoot paper negatives
and it works well for me.
Hope this helps,
Guy
- Original Message -
From: William Erickson erick
I've thought this through but haven't completely verified it yet, but I
wanted to see what others reaction is. BW paper used as a negative is said
to be contrasty. What does this mean? BW paper has a sensitivity range of
a little more than four stops for any given exposure. Burning and dodging
of the
metal that you made the PH out of is covered. Glossy paper is a nightmare
in
cylindrical cameras
andy
-Original Message-
From: pinhole-discussion-admin@p at ???
[mailto:pinhole-discussion-admin@p at ???]On Behalf Of William
Erickson
Sent: Thursday, July 11, 2002 7:47 AM
Mysterious!
- Original Message -
From: Tim Rawling pin_...@hotmail.com
To: pinhole-discussion@p at ???
Sent: Thursday, July 11, 2002 6:56 AM
Subject: [pinhole-discussion] close up flower shots
Hi all,
I just uploaded some close up pinhole images from a series that I have
been
I see these sometimes, but not always. They usually seem to be related to a
light source, so i'd guess it's diffraction. try a shot away from any light
source and see if they're still there.
- Original Message -
From: Justin Bell j.b...@paradise.net.nz
To: Pinhole-Discussion@p at ???
Ilford multigrade is best. If you are going to use paper flat, then the surface
doesn't matter. if you are going to curve the paper, as around the inside of a
can, use the flattest surface you can get. I think peal is as dull as Iolford
gets. The usual rule of thumb for any paper is ISo of 5 or
Here is an image from a pinhole bodycap on a Nikon D1X digital camera.
www://???/discussion/upload/gallery2002.php?pic=digital_pinho
le.jpg
The camera allows exposure times up to 30 seconds. Compose and meter for F22
(you can pre-set ISO and just use what you were otherwise using). Multiply
Try the Black Cat thing. I can't remember the rest of the name. You can find
it under Black cat at pinhole resource and other camera places. It's not a
meter but it will translate from f22 to the higher Fstops. It's a $20
carboard dial with a long list of exposure by condition suggestions too.
Covering Power of PinholesSimple answer is that covering power generally is 1
1/2 times the focal length either side of the axis. Erics book has both complex
and simple formulae. The simple formula is the diameter of the aperture in
thosandths of an inch (for example 0.010= 10) divided by 55
Any power tool will shred the cardboard. I'd use either an xacto knife or a
single edger razor blade.
- Original Message -
From: Chris Harris cpharrisph...@hotmail.com
To: pinhole-discussion@p at ???
Sent: Thursday, May 23, 2002 7:58 PM
Subject: [pinhole-discussion] Cutting oatmeal box
I'm about to leave for two weeks of pinholing in Italy. I feel rather self
conscious about digging in a changing bag and putting out suspicious looking
cannisters on the Ponte Veccio. Can some one tell me how to say It's just
an home made camera, or I am harmless, though eccentric in Italian?
If the essence of a child is movement, then a pinhole is the ideal method to
desribe it. My experience is that you can captue quiet movement easily
enough in bright sun. Anything moving throughout an exposure of more than
ten seconds will simply disappear. I enjoy playing with overnight exposures,
I find that if you leave the dark slide in, it tends to wobble or catch the
breeze and move the camera. I pull it out and then throw my jacket or a
black plastic bag over the back of the camera. that's what dark cloths are
for in large format lens photography.
- Original Message -
From:
A 0.44 mm aperture placed 145mm from the film will cover about 500 mm. The
formulas is that the coverage equals about 1 1/2 times the focal length
either side of center. Focal length is just the distance from the pinhole to
the film. It's really a misnomer because nothing focusses, it's just the
I've seen a number of wooden ones on Ebay.
- Original Message -
From: Greg Newberry grnewbe...@qwest.net
To: Pinhole-Discussion pinhole-discussion@p at ???
Sent: Monday, April 08, 2002 8:10 PM
Subject: [pinhole-discussion] Source for 8x10 film holders
Hi, I want to buy a few used
This seems like an opportune time for a variation on the scaner topic. I
have negative scanners but my flatbed scanner is older and not too adequate.
Any advice on choice of flatbed scanner for prints, not negs?
Are these good scanners for opaque material or are they just attractive
because they offer the opportunity to scan negatives?
- Original Message -
From: dalf...@aol.com
To: pinhole-discussion@p at ???
Sent: Thursday, March 21, 2002 12:08 AM
Subject: Re: [pinhole-discussion] Epson
Well, actually, the angle of view depends on there being a flat film plane
interposed on the hemispheric optimal image distance. The average 'angle of
view' is 1.5FL either side of the axis. Light falloff is a function of the
different distance from the pinhole at different points on the flat film
There are at least two different formulas for the pinhole to film plane
distance question. There are lots of different tables already calculated
that have been referred to before. See Eric Renner's book for a long
detailed description. Also, since you can be off from the right distance
by a factor
Don't know about the photo-flo, but I have dried film in all sorts of
configurations. One time I left a roll of film hanging for ayear to see how
much dust it accumulated (surprisingly little, probaby because it was
vertical and in a protected corner with no airflow.). If the film is in an
area
The first rule of pinhole is Play!. Try what you said and see if you like
it. My impression is that a lot of the pinholers here use converted lens
cameras or the Zero series. Next favorite is the curved film plane ones,
with the oatmeal carton being the prototype. Figuring out what you yourself
Very nice. I have played around with double exposures, pinhole and
otherwise. I find that including sky in the first exposure tends to
eliminate the second exposure appearing there.
- Original Message -
From: Mark Interrante m...@interwalk.com
To: pinhole-discussion@p at ???
Sent:
Glorieux
- Original Message -
From: Bill Erickson erick...@hickorytech.net
To: pinhole-discussion@p at ???
Sent: Sunday, March 03, 2002 8:55 AM
Subject: Re: [pinhole-discussion] Hand made darkslides
I've tried it, can't say with much success. I was making a film holder
I've tried it, can't say with much success. I was making a film holder for a
daguerreotype plate by laminating succesive layers of model airplane plywood,
using one of the thinner pieces for the dark slide. it worked OK for the dag
because the plate is so slow', but for film or photographic
That's some sort of diffraction pattern, I assume from internal reflections.
if you figure it out let me know. i made one camera that did the same thing
and i could never isolate the source.
- Original Message -
From: Daniel Donnelly danieldonne...@yahoo.com
To: pinhole-discussion@p at
Very nice. I like the kalotype best. I think it's neat to have the whole
process be handmade.
- Original Message -
From: Ingo Guenther ingoguent...@web.de
To: pinhole-discussion@p at ???
Sent: Friday, January 25, 2002 6:02 PM
Subject: [pinhole-discussion] New Pictures uploaded!
Hi
Thanks for the response. I was looking at the picture and realizing that one
could sense the space by feel, heat, noise and the warmth from sunlight.
- Original Message -
From: pete eckert peteeck...@mindspring.com
To: pinhole-discussion@p at ???
Sent: Monday, February 25, 2002 1:54 PM
As ithink about your image, i have a question which I think pertains to our
art and is not just ersonal poking around. I have had experience with
hearing impaired people, and I have the impression that those who have been
deaf since birth and do not experience sound except as a sense of vibration
Amazing!
- Original Message -
From: Steve Wilson steve.wil...@eyeconcur.com
To: pinhole-discussion@p at ???
Cc: peteeck...@mindspring.com
Sent: Sunday, February 24, 2002 9:26 AM
Subject: [pinhole-discussion] New image saloon uploaded on behalf of Pete
Eckert
A new image, Saloon, has
All suggestions will work, but just letting it dry and then re-wetting it
when you want to clear it worked OK for me.
- Original Message -
From: dalf...@aol.com
To: pinhole-discussion@p at ???
Sent: Thursday, February 21, 2002 12:09 AM
Subject: Re: [pinhole-discussion] Type 55
If you use lith developer, you will get only blacks and whites. If you use
dektol1:2 you will get some shades of grey. It's easy to try other film or
paper developers since you can develop by inspection, just deelop until it
stops changing. I think you'll get more pleasing results using Dektol.
Try 5 or 10. Instead of under or over exposure what you get is more or less
black areas. it's alsmost a matter of personal taste.
- Original Message -
From: ra...@rahji.com
To: pinhole-discussion@p at ???
Cc: ra...@rahji.com
Sent: Wednesday, February 20, 2002 2:44 PM
Subject:
My memory of my work with type 55 is that the reciprocity corrections used
for other film worked fine with type 55. I exposed for negative, not
positive, ASA 25.
- Original Message -
From: Markus Birsfelder b...@freesurf.ch
To: pinhole-discussion@p at ???
Sent: Wednesday, February 20,
No. They're bigger and you will need a different, and much more expensive,
slide projector. Sorry.
- Original Message -
From: R Duarte ra...@rahji.com
To: pinhole-discussion@p at ???
Sent: Tuesday, February 19, 2002 7:18 PM
Subject: [pinhole-discussion] 120 slide film?
Hi. Stupid
I've seen the prototype and talked to the fellow, but i haven't seen any
pictures. It seems to be well thought out.
- Original Message -
From: Tom Harvey harv...@aracnet.com
To: pinhole-discussion@p at ???
Sent: Saturday, February 16, 2002 8:41 PM
Subject: [pinhole-discussion] Pinhole
If the focal distance is 1/3 inch, you could expect a visible image cone
of about 1 inch. The rule of thumb is one and a half focal lengths either
side of the axis.
- Original Message -
From: J.E. Patterson pinh...@lightjunkie.org
To: pinhole-discussion@p at ???
Sent: Saturday,
You might be getting some flare from shooting toward the sun. this flattens
out contrast. Also maybe some fogging? It is said to be very difficult to
boost contrast with Ilford film. try tmax.
- Original Message -
From: Liav Koren yu257...@yorku.ca
To: pinhole-discussion@p at ???
Sent:
Since you brought this up, there are two factors influencing the intensity
of light at the film plane, the distance from the pinhole and the angle off
axis. As you move off axis of a flat film plane, the distance from the
pinhole to the film grows, and the apparent shape of the pinhole changes
When you increase the focal length but leave the negative size the same all
you do is decrease the angle of acceptance of the light beam. You sample a
smaller portion of the potential image. I can't see how the size of the
pinhole would make a difference, except that it casts an optimal potential
Great image. I'm reminded of some postings here a while ago of trafic and
people in times square. I don't care much for zone plate still lifes, but it
gives an interesting sort of surrealism to people.
- Original Message -
From: Mark Interrante m...@interwalk.com
To: pinhole-discussion@p
I noticed the lapse also. I think it's happened before on weekends. I
thought maybe I'd done something wrong and was being shunned. Nice to know
it's not so.
- Original Message -
From: Ricardo Wildberger Lisboa wildber...@svn.com.br
To: pinhole-discussion@p at ???
Sent: Saturday,
The addresses I wrote only take you to the gallery page. the images are in
the 2002 gallery.
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