Hmmmmmm
Reality check? - will the A7r be the same?
A7 Torture Test with M mount Lenses
Reality checks are always a good thing Jono :thumbup:
Based on specifications, I suspected that the A7 may not fare well with some, if not many M wides. Although, the 21/1.4 ASPH (a lens I own), looked correctable at f/8. I'll never know since I wouldn't opt for an A7 ... a camera I see as more of a general consumer camera most likely to be used with the lenses made for it. That Sony bundles a kit lens with the A7, and doesn't with the A7R, reinforces that speculative opinion.
What is not perfectly clear is whether the following Sony sensor description found under the A7R's overview specifications applies to both cameras:
"Every gapless on-chip lens (OCL) is designed and positioned to cover every pixel and eliminate the spaces between the micro-lenses to collect significantly more light. Moreover, each on-chip lens is optimally positioned depending on its location to accommodate the sharper angle of light entering the periphery, which is caused by larger sensor dimensions being teamed with the E-mount's short flange-back distance".
If the above is only applicable to the A7R sensor, I wonder how any Sony FE W/A will do on the A7? Perhaps that's why FE35mm is currently the widest prime and is only f/2.8, and the 24-70 is a f/4? Although, Zeiss tends to be conservative with max apertures on more mass produced W/A optics (i.e. the ZA 24/2 as opposed to a f/1.8 or f/1.4 available from other makers). It is also conceivable that FE lens corrections are built into the A7 imaging system. Obviously, standard E mount lenses wouldn't suffer from edge and corner effects since the camera auto defaults to an APSc crop.
My over-riding interest in the A7R is for use with my Leica M50/0.95 Nocti and 75/2AA (with a milder concern for the 35/1.4 ASPH and 90/2.8) ... the minute I get the A7R camera I'll test those lenses in the manner I tend to use them, and if found wanting will wave bye-bye as the UPS fellow takes it back to B&H. Of course, I'll try the 21/1.4 ASPH ... which is great on the MM. However, since I shoot mostly people, it rarely gets used and I should sell it to someone who would get more out of it than I do.
- Marc