Dan Lazin
Member
Hey there, list. Second problem of the day (but it's still a good day, since I have my R-D1 back in nominally working order, and I only noticed this problem today because I finally have a camera to attach the lens to).
Onward: My new Voigtlander Super Heliar 15mm f/4.5 takes lovely pictures on my R-D1 -- and I don't mind the vignetting at all -- but when I mount it using a new Voigtlander LTM-to-M adapter, the lens doesn't rotate quite as far as you'd expect. The built-in petal-shaped hood, that is, isn't aligned with the big parts of the shade at 0 and 180 degrees like you'd expect, but rather at about 350 and 170 degrees. It simply doesn't seem to screw in far enough to orient as you'd expect.
This has no practical effect, since the lens elements have no idea they're askew, and if the hood is causing any vignetting by being off a little bit, the R-D1's 1.5x crop eliminates any evidence.
But it is strange. Is it normal? Is the lens perhaps designed to align correctly when mounted on a thread-mount camera, and thus kept from rotating to the expected position because of the extra mm or so or adapter that's in the way?
Onward: My new Voigtlander Super Heliar 15mm f/4.5 takes lovely pictures on my R-D1 -- and I don't mind the vignetting at all -- but when I mount it using a new Voigtlander LTM-to-M adapter, the lens doesn't rotate quite as far as you'd expect. The built-in petal-shaped hood, that is, isn't aligned with the big parts of the shade at 0 and 180 degrees like you'd expect, but rather at about 350 and 170 degrees. It simply doesn't seem to screw in far enough to orient as you'd expect.
This has no practical effect, since the lens elements have no idea they're askew, and if the hood is causing any vignetting by being off a little bit, the R-D1's 1.5x crop eliminates any evidence.
But it is strange. Is it normal? Is the lens perhaps designed to align correctly when mounted on a thread-mount camera, and thus kept from rotating to the expected position because of the extra mm or so or adapter that's in the way?
phototone
Well-known
Not all LTM lenses will perfectly line up top to bottom with an "M" adaptor. Some "M" adaptors might be made to looser tolerances than others. Have you tried a genuine Leitz "M" adaptor, even an old used one?
Sukiari
Member
It's common for LTM lenses that would require an accessory finder to mount at an angle. The reason for this is so one can more easily see the focusing dot with the finder attached.
However, mine mounts with the focusing dot a 0 degrees (on top).
However, mine mounts with the focusing dot a 0 degrees (on top).