Zorki 4K and canon LTM lenses

[campy51]

I bought a cheap Zorki 4K to use with my Canon LTM lenses since my Canon has a shutter problem and the only one that fits is the 50mm f1.8. The 85mm and the 135 mm won't screw in all the way. Anyone aware of this and did I buy the wrong camera?

 

[reddesert]

Many long focal length lenses for LTM rangefinders use a tongue-like rangefinder cam that projects from the back of the lens. This hangs up on the body's focusing feeler on FED and Zorki cameras and maybe some others, preventing them from screwing in. Don't force it. On a Canon rangefinder, there is a little wheel or maybe a rounded shape on the body's feeler so that the tongue can pass over the feeler smoothly.

For the FED and Zorki rf bodies, the FSU made long focal length lenses have a focusing cam surface that goes all the way around the lens, like on the 50mm, so one doesn't have this problem.

You would probably also find that the different calibrations for FSU-era vs Leica/Japanese lenses are "close enough" for the 50mm lenses but result in focus offsets with the longer focal lengths.