I have heard, but cannot confirm it but I think this lens was used in the design of the 85mm F2 Russian lenses which fitted the Kiev 4 and 4B Contax clones. Also on a different mount (42mmscrew thread) to fit the Zenith Reflexes. If that is true then I didn't think a lot of it. I borrowed one to fit on a Pentax Spotmatic years ago and it had such low contrast it was unusable - almost.

But there again Russian lenses were, shall we say questionable in the quality control department, this may have just been a bad one.