Hello everybody. I have bought used lens and have to clean it for it has a dust everywhere. First of all I have disassembled rear side and cleaned it. I have reassembled it and it works almost fine except one thing. The diaphragm doesn't stops. After disassembling I found out, that I don't know, how could it stop the diaphragm shutter. I have looked through the article http://rick_oleson.tripod.com/index-161.html My coupling ring differs from the ring painted in the article. Does anyone have repair manual on this lens? Or can anyone explain or paint how coupling ring should be positioned with apperture ring? Thanks!
I take it that your lens is the nFD version - no silver breech ring and you removed three radially placed screws to remove mount. The inner 'finger' of the rear operating levers in the rear mount locate in the forks of the internal actuating ring/lever. When you locate the mount in the lens, you have to move the external lever on the rear mount so that they locate in the forks. Then, as you push the mount into the locating ring, you must rotate the circular inner part of the mount anticlockwise so that the rectangular release button locks in the demounted position.
