Once (upon the time) I had a typical portrait lens, it was the U.S.S.R. made Jupiter-9 85mm/f:2.0 - probably some Zeiss Sonnar clone. I bought it a brand new at the local Foto-Kino store for an equivalent of $10, which even 50 years ago was an excellent price. Well, I had a little bit trouble with it, as it was designed for the Zorki cameras and I had the FED II (NKVD version

). Anyway, both cameras used the same mount, the Leica's 39mm, but for some reason the Zorki cameras had the flange farther from the film plane, but about 1mm. So I had to machine two 1mm thick rings, one had to be glued to the lens flange and the other to the lens "end", where the lens was touching the rangefinder lever. Anyway, it worked perfectly. The slides were beautiful, with unbelievable bokeh (well, at that time this term was completely unknown).