|Posted: Sun Jan 14, 2018 9:27 pm Post subject:
|There are several versions of each, and some of these may be the same lens - that is, the same design. Quite a lot of lens designs and even manufacturers were shared between the second-tier of Japanese camera companies.
From experience, the actual result is going to vary so little it doesn't matter. A 55/1.4 from any of these companies (Revuenon is Foto-Quelles rebranding of Cosinas or Chinons, etc.), is a 55/1.4 .
You are going to be using the same M42 adapter anyway, on your DSLR.
Best to be more concerned about the condition of the lenses you are offered.
I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work.