|Posted: Sun Aug 26, 2018 12:53 pm Post subject:
|Voigtlander lenses are built for Leica-specification for rangefinder adjustment.
If your camera is too, then there should be no issue.
There's 2 potential issues with "M39"-lenses:
1. Some Soviet SLR-lenses have 39mm thread but much bigger registration distance, and no rangefinder-coupling. Unusable on a rangefinder, unless you use a spacer and the camera has liveview.
2. The Soviet LTM-lenses will physically fit and work (except for some versions of the Jupiter-12 / Biogon-clone), but the Soviet LTM-rangefinder-cameras (FED, Zorki, Leningrad) have a slightly different standard for the rangefinder, so focus may be off on a camera bult to Leica rangefinder-standard (unless the lens is calibrated to Leica-standard)
3. A lot of the confusion comes from the fact that some lenses, such as Jupiter 9 and Jupiter 11, have been made in both LTM and SLR M39 mount.
Hope this helps!