friedemann_wachsmuth Posted December 11, 2007 Share Posted December 11, 2007 Hey there, I bought a heavily used RB67 Pro-S with the 127mm C-Sekor quite a while ago. After exchanging the light seals, bending some pins and other minor repairs, its working snappy and reliable -- and I also got used to the somehow cumbersome handling. I love this camera. However, I have a weird problem: Focus on the focusing screen differs significantly from the film plane. I first thought its due to my bad eyes or me being slow, but with aperture wide open, carefully focused on the eyes, the ears actually get sharp. I did the test and put vellum drafting paper into the magazine, focused carefully on a big object (about 6 ft away) and checked on the focusing screen: The focusing screen would need to be approx 4mm deeper into the camera then it is to show the same result! How can this be? The adjustment screws could not really go that much deeper. The focusing screen is original, matt side down, looks totally ok and is fitting in well. I suscpected the mirror to be in wrong position, but after going through the service manual, that is unlikely and its position looking well too. Any idea or hint anyone would could be wrong? Any help is appreciated. I invested too much time and sweat into this wonderful camera already to not get it totally working now :) Link to comment Share on other sites More sharing options...
godfrey Posted December 11, 2007 Share Posted December 11, 2007 Sounds like the mirror is not going to its proper reference position to me. Godfrey Link to comment Share on other sites More sharing options...
User_503771 Posted December 12, 2007 Share Posted December 12, 2007 I agree. But be that as it may, *something* obviously needs calibrating! And it seems to me it ain't your eyes! Link to comment Share on other sites More sharing options...
friedemann_wachsmuth Posted December 13, 2007 Author Share Posted December 13, 2007 I got the ground glass now screwed down to the bottom -- that improved things a little bit. However, I am still missing about 2mm... I opened it up firther and the mirror looks like being absolutely precise where it should be. Will dig deeper -- any other hint would be appreciated though :) Link to comment Share on other sites More sharing options...
eyepasha Posted May 18, 2008 Share Posted May 18, 2008 isn't it the case that it is more likely the film plane is not in the right place when the ground glass is in focus rather than vice-versa. Is your lock and back adjusted correctly? Link to comment Share on other sites More sharing options...
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