Penumbra
16-Oct-2019, 08:41
I'm having trouble finding an answer on this one...
I recently picked up an old triple convertible Wollensak from another member (Thanks, Earl!) and I want to give this thing a decent run-through to see whether I like the results...but the old dual-piston shutter is unreliable at best. So, in an effort to find a working shutter than will fit it, I measured the outside diameter of the threading on the cells: 31.15mm...which corresponds to exactly NOTHING that I can find. When I first saw the lens I thought "Huh, that's close to a Copal 0..." but: no such luck. The pitch on the threads seems to be very close to 0.5mm, but that 31.15mm outside diameter is seemingly singular: I'm looking up pitches in machinists' textbooks and not finding anything with that diameter...so does anyone have any idea on where to go with this?
Secondary option: If a modern shutter isn't available without the several hundred dollars that such an effort will require from SK Grimes - whom also have no experience with this lens, after an inquiry - is there anyone still doing dual-piston shutter repairs?
I recently picked up an old triple convertible Wollensak from another member (Thanks, Earl!) and I want to give this thing a decent run-through to see whether I like the results...but the old dual-piston shutter is unreliable at best. So, in an effort to find a working shutter than will fit it, I measured the outside diameter of the threading on the cells: 31.15mm...which corresponds to exactly NOTHING that I can find. When I first saw the lens I thought "Huh, that's close to a Copal 0..." but: no such luck. The pitch on the threads seems to be very close to 0.5mm, but that 31.15mm outside diameter is seemingly singular: I'm looking up pitches in machinists' textbooks and not finding anything with that diameter...so does anyone have any idea on where to go with this?
Secondary option: If a modern shutter isn't available without the several hundred dollars that such an effort will require from SK Grimes - whom also have no experience with this lens, after an inquiry - is there anyone still doing dual-piston shutter repairs?