I'm playing with a new NEX-7, and tried my 28mm Elmarit ASPH last weekend. In some contexts, cyan vignetting was visible, if I looked. I might need to fire up Cornerfix, although it seems like a lot of trouble. I tried my old Elmar 135mm f4.0, and it worked like a charm and looked great. It's an underappreciated lens. I think I need to fool with the fringing feature on manual focus a bit more. I didn't feel as confident about nailing focus and putting it exactly where I wanted it as I generally can with M cameras. All in all, I really like the NEX though--enough to order a 32mm Zeiss Touit. I think that, the kit zoom and a Sigma 19mm (which I bought with the camera and really like), as well as occasionally playing with the Leica glass and some Nikkor AIS lenses will do me.
I'm wondering whether these digital cameras' ability to correct lens weaknesses with firmware takes away some of the thrill of really stellar glass like Leica and Zeiss? Anybody here know enough about that to comment intelligently without starting a flame war? That Sigma 19mm looks pretty nice with RAW files converted by DxO, as does the kit zoom, although I haven't really tried to show up the flaws on either; just shooting around so far. I'm not looking to dump my Leica and Nikon gear, but I have to say that this little camera has given me a more open mind.