The focus adjustment ring on my bolex h16 reflex camera is stuck. I have tried focusing the ground glass with the lenses removed and the camera pointed at a bright light source. The ring will move a little bit and I can see the ground glass blurring and sharpening, but I do not have full movement of the ring. I tried losening the screw on the focus ring and re-tightening it, and it still will not budge. It feels as if it is catching on something, I can hear a little clicking noise when I try to turn it.
I am thinking that I may need to take apart the diopter to find out what is jamming it up internally. I can't figure out how to do this- apart from tightening and loosening the screw on the focus ring.
If it is possible, I would like to try to repair this by myself. Any suggestions?