So this guy has an interesting hobby, taking all number of old lenses and remounting them in different focussing mounts, mostly old Leica Screwmounts. There's a lot of different ones, some of the Kinoptic ones have sold for 4 figures, although there's been some Foca and Som Berthiot sold for just over $100. I don't suppose anyone around here has had a chance to try one, or heard from someone who has? I've no reason to doubt that the rangefinders would line up as s/he claims, there looks to be old mounts from old summarons/elmars so finding one that's near enough for the narrow apertures wouldn't be that hard. I'm wondering about the other aspects like image quality and rendering, not to mention coverage (as a lot seem to be old cine-lenses), and there's not much info out there. Obviously if I had $3k I'd rather have a brand new Asph/Apo Leica, but for $100 I'm wondering if they're any better than a collapsible summar(on) or Ukranian Jupiter etc? Or should these just be put in the 'historical/geeky oddity' bin, and let the collectors/GASsers have at them?