One of the reasons I got into the NEX platform was for adapted lenses. I kept reading how great they are on the NEX cameras and when I got my NEX 5 I also got a Rainbow Imaging LTM adapter for it. I put the Industar-61 from my Soviet made Fed-2 on it and had a really hard time focusing. After the v3 firmware update it got much easier to use. Here's the combo with my Gordy's strap attached. The vented hood is a good idea because this lens tends to flare a bit. Here's a few sample shots from it. The Industar-61 is a 50mm f/2.8 with a Leica thread mount, also known as M39. I got mine, along with the Fed-2 it was attached to from an eBay seller in The Ukraine. There are lots of Soviet lenses and cameras for sale on eBay, but, if I had it to do over, I'd buy from a seller here in the US. A seller that I've had good experiences with is Fedka. Before I could use my camera and lens I had to send them both in for service to Fedka, which is common with this eBay cameras and lenses. Fedka is in New York City and does fantastic work. They sell a lot of Soviet lenses for a fair price also, so it's not too cost prohibitive to try out cool old lenses on your NEX! Disclaimer: I have nothing to do with Fedka other than just being a satisfied customer.