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
