I have a 300mm Symmar-S in what I think is a DB lens mount. Actually to be clear (since I know little about the Sinar system) it is a shutterless board that I can adjust the aperture from the front of the lens. I know I've seen DB mounts that don't seem to have that capability and some that do, but I assume they are both DB mounts?
Anyway, I don't have a Sinar shutter, and I'm a little financially tight at the moment, trying to get a properly shuttered lens for testing my new 8x10 camera. I'd rather not test it while trying to simulate a shutter with a lens cap, given that my inexperience would spoil most tests. In my 4x5 lens collection, I have a 360 Tele-Arton in a recently CLA'd Copal #3 shutter. The shuttered versions of the Symmar-S 300mm I see on eBay also use the Copal 3. Can I assume that the elements from the DB board will work correctly in a Copal #3 shutter, or did the DB versions of these lenses have different mount/spacing? The Tele-Arton is a ƒ5.5 so the aperture scale should be close enough.
(I don't use the Tele-Arton very often, and probably will less now that I have the Nikkor Tele 360/500, so I can put the tele-arton's elements on a shelf for a while, if it will help me spread out the cost of kitting up the 8x10.)
thanks.
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