I am considering buying an estate kit of Sinar gear and have discovered an unusual type of shutter I've never seen before. On my own system, when I open the lens and adjust my aperture, I see the aperture blades move. On these estate lenses, with the lens open, the aperture doesn't open and close. But when I close the shutter I can see the aperture working from the back. The shutters are marked COPAL and WISTA. They have a silver shutter speed ring. I am wondering (1) what is this type of shutter called? (2) Are these shutters working properly? and (3) what kind of photographer uses a shutter like this? I am really interested in this lot of Sinar equipment, but I want to understand what I'm getting before I make an offer. I appreciate any information I receive. Many thanks.
Bookmarks