Hello All, Thanks for the excellent information. I thought I would share the results of a little experiment I just performed. I was very curious if the 12" lens without any iris would cover 4x5 at infinity and f16 with an external iris. I made a black paper f16 aperture and taped it to the rear of the lens. No way. Nowhere near enough coverage. Moved it to the front. Just covers, with a little to spare. I haven't done the experiments to determine the proper settings for my 6 inch with unmarked iris, but I will.
Gene _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
