cosmonaut
Well-known
Well I have a M6 and Voigtlander 40mm and I filed the lens to bring up the 35mm frame lines and find it fairly accurate. I would guess the Rokkor could be modified just as easy.
steelydam
Established
I do fine with my CV 40mm lens on my Voigtlander R2M using the 35mm framelines. No problems whatsoever with the camera, either.