>>4304079I did something similar a long time ago with the lens out of a “Kiev 30”, labelled as an industar-m 23/3.5. On my old nex3, that thing was a lot of fun in 2010 even if we’d call it a piece of shit nowadays. Eventually was able to transplant the helicoid from the original camera also and actually had focusing. I don’t remember what even happened to it.