I have a project for an upcoming show that I have been using my Nikon 20mm f1.8 lens for, but it is not really user friendly for manual focus, which of course is necessary for the Sony.
The Leica R 21mm is tempting, but I have no idea of the various versions and their qualities.
The 21mm M mount might fit the bill if it actually works on the A7xx- I had a bad experience with the
28mm M mount, and had to go to the R. M is smaller and more compact, especially when mounted on the adapter, which is quite a bit smaller than the R adapter.
Anybody have experience with this focal length on the Sony?