Jupiter 12 Rangefinder Cam issue

[comp_wiz101]

Hello, I've been testing my J-12 and I'm finding that the Infinity position for the cam, that sets the rangefinder for infinity is a bit off...somewhere a bit closer to the 15m mark. DOF even at f 2.8 more than makes up for it, but should I be worried at closer distances. I know it is not the rangefinders in the cameras, because I checked the calibration on all three of mine.

I checked the 1m close focus calibration...it appears to be dead on.

 

[OldNick]

What camera do you use with the LTM Jupiter 12? I have a 1987 black J12 that works fine on my Leica IIIf.

Jim N.

 

[comp_wiz101]

Zorki 3, Zorki 4K, and a Zorki C
I got the lens from a RFF member, and he used it without incident, so I'm not feeling extremely worried about it....