M42 lens to Sony E mount adapter Lens Adapter NEX3 NEX5 NEX7 NEX-3 NEX-5 NEX-7 NEX-VG10 DC108 (Electronics)
I use this adapter to the Sony a7, currently with a Pentacon 1.8 / 50 Auto MC. As far as I've found it so far, is focusing on "infinite" possible, there is no play on the lens or camera side. The adapter is also a small Allen key, with the