Jupiter-8, modified for close-focus, on the Leica M9.

Probably the cheapest 50mm Sonnar available. The later version with single-helical, rotating front, is easy to modify for close focus. The lens uses a screw for the close-focus stop, it can be removed. After that, the threads need to be filed down so the RF follower holds contact with the Cam.



RF Coupling holds to ~0.65m

Old Close-Focus

New close-focus