Quote Originally Posted by jglass View Post
My 50mm summicron has developed a loose ring, the one on which the little white dot that marks the aperture setting is located. That little ring just spins around; the aperture ring appears to be working fine. I have not film tested the issue yet.

Can anyone tell me what kind of fix that entails? Could I do it myself? I can't really figure out how it works, although I'm not too mechanically inclined.

Thanks.
You might check on the rangefinder forum. A lot of help there also.