Using on a Sony nex7 various Rollei Zeiss lenses including the 18mm f4 also have the adapter Rollei to Nikon but it does contain a glass element results appear to be excellent however with no af confirmation though - on the Sony cameras there is focus peaking as an aid. I am tempted with a full frame sony A7 or A7r - Regards
I am using ALL of my C/Y Zeiss and other foreign