Does anyone have experience using Alpa bayonet lenses on the A7? Some wonderful and very esoteric lenses were made for this system back in the day. It has peaked my interest due to the fairly short flange to focal distance of the Alpa mount. At only 37.8mm the FTF is shorter then the shortest Japanese SLR system which is Konica at 40.5mm. A shorter adapter will help the overall A7 package stay nice and small.
My concern is that the mount registration distance is getting so short that it is very close to some of the longer rangefinder distances where we know all kinds of corner and smearing issues can show up. For instance, the Contax RF register is 34.5mm.
Im wondering though if the lens designs for the Alpa system were more SLR like then Rangefinder like so this might help prevent bad corners and such.
And advice would be appreciated.