It seems like all the ones I find can focus to infinity on lenses OVER 50mm. So I have a Helios 103 - 50/1.5 (and want to get a Jupiter 8) Any suggestions on a decent adapter or do I settle for no infinity focus? Is that good enough? Any thoughts?
What I am gathering is that it has to do with the length of the adapter (but then again I could also be completely wrong).
