Hi guys:
I am having a problem with the Leitz Wetzlar R to M Adapter 22228/500934. I can't understand why it wouldn't let me mount Elmarit-R 16mm/2.8 fisheye on it. My lens was made in 1975 and is a 2-cam version.
I did search the forum and found a couple of threads suggesting that this particular adapter was not made specifically for R-lenses and doesn't work with some of them. There is a small metal part sticking out right beside one of the prongs on the R-side of the adapter (see the photo):
I thought that was the reason. But I was wrong. As you can see from the photos below, I have a spare R-mount, which looks exactly the same as the one on the lens. Yet, that spare mount fits into the adapter perfectly well and clicks in place, while the lens mount doesn't. The same rear Leica cap fits both the lens mount and the spare mount equally well.
What could be wrong? What should I do? Help!