[Cameramakers] Enlarger Light Source using LEDS
Hi, Just modified my LED enlarger to use Royal Blue (455nm) LEDS from the old Blue (470nm) ones, I get grade 4.5+ now. www.huws.org.uk and follow led enlarger Huw ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
RE: [Cameramakers] ? regarding apertures -- schematic..
Interesting, I build one of those years ago for a theatrical application. 40 thousands aluminum sheet and a rotator of masonite if I recall correctly. About a foot and half in diameter. Worked for the show, long since lost. Regards, Fox sends -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 28, 2002 7:59 AM To: [EMAIL PROTECTED] Subject: Re: [Cameramakers] ? regarding apertures -- schematic.. Bob, I would scavenge for a large iris aperture as you suggested, however, i am scaling everything up (very large, about a 2 foot opening.. it's a long story ; ), so it should be easier at a larger scale. I don't know of any application that someone might have needed a monster diaphram for (except maybe military), and it is necessary that it be hand-built. thanks! joel ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
[Cameramakers] ? regarding apertures -- schematic..
Hi, take old lens appart, put leaf into enlarger..bingo, a bigasyoulike leaf! Huw ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
Re:[Cameramakers] ? regarding apertures -- schematic..
Message: 5 From: [EMAIL PROTECTED] Date: Tue, 27 Aug 2002 21:18:09 EDT To: [EMAIL PROTECTED] Subject: [Cameramakers] ? regarding apertures -- schematic.. Reply-To: [EMAIL PROTECTED] Hello fellow afflicted; I was wondering if anyone on the list might have a schematic laying around for leaf apertures, e.g. enlarging lens apertures (remember the opening credits of the early 007 movies, with james bond moving around and the aperture following him? : ) Two things. First the effect seen in the opening of James Bond Movies is that of looking through the barrel of a hand gun, not looking through an aperture. The curved lines are the rifeling of the barrel. More to the point, go look at Ed Romney's and Thomas Tomosey's books on camera repair for photographs and diagrams of disassembled iris diaphragms. They should be in your local library if you don't wish to purchase them yourself. -Fritz M. Brown GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/web/. ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
Re: [Cameramakers] ? regarding apertures -- schematic..
Dear Joel, I did once find such a diaphragm and you will never guess what it was doing. It was an aperture for a fan. Please do not ask why it was done this way. I doubt that it is a full 2 feet in diameter, but more than 1 foot is possible. In any case, on such a large scale I agree making it is less frightening. I would not like filing all those little slots, but some big ones sounds far easier. I might be able to photograph a diaphragm when you do not turn up a model, but there must be drawings in books (Focal Encyclopedia?). Bob At 10:58 28.08.02 -0400, you wrote: Bob, I would scavenge for a large iris aperture as you suggested, however, i am scaling everything up (very large, about a 2 foot opening.. it's a long story ; ), so it should be easier at a larger scale. I don't know of any application that someone might have needed a monster diaphram for (except maybe military), and it is necessary that it be hand-built. thanks! joel ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
Re: [Cameramakers] A question regarding a lens
Gene, If you get a chance, please let me know your results. It will be a couple of weeks until I find time to put together a 4x5 camera to test the concept. The lens appears to be a 4 element in 3 group format similar to the tessar lens in the 127mm ektar. Athough it is uncoated, those lenses were reported to be very good in the 4x5 format. I have no idea how the front element focus will hamper the lens's performance. Thank you. Rich --- Gene Johnson [EMAIL PROTECTED] wrote: I have the same camera. the 616 Monitor and Vigilant used the same lens. Might be tight for 4x5, I could test it on my Horseman easy enough if you're not in a big hurry. Gene - Original Message - From: Robert Stoddard [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, August 27, 2002 7:01 PM Subject: Re: [Cameramakers] A question regarding a lens = Richard E. Adams [EMAIL PROTECTED] __ Do You Yahoo!? Yahoo! Finance - Get real-time stock quotes http://finance.yahoo.com ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
[Cameramakers] Off Topic - Re: James Bond
In the 007 movies? That was not an iris! That was the inside of a gun barrel! Those cuts inside the barrel make the bullet spin, and therefore keep a straight trajectory. James Bond had good looks for the time, but he was no photo-shoot-posing-model, he was a spy for leaf apertures, e.g. enlarging lens apertures (remember the opening credits of the early 007 movies, with james bond moving around and the aperture following him? : ) __ Post your ad for free now! http://personals.yahoo.ca ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
[Cameramakers] front element focus
I've heard somewhere that a front element focusing len's optimal position would be the hyperfocal distance setting when used on a moveable lens plank. julianhttp://job.webstar.nl/http://members.ams.chello.nl/j.o.bell/
