Today tested and compared Sony A7 + Pentax A 35mm F2.8 and Sony A7 + Sony Zeiss FE 35mm F2.8
Pentax A 35mm F2.8 is very interesting lens.
Optical formula not same as new Pentax DA 35mm F2.8 lens and don't have autofocus analogues.
This is not a full test and comparison of lenses, and simply amateur images (sorry for different sizes and positions).
Just did two shots: first Zeiss 35/2.8, then Pentax 35/2.8.
At the same ISO and aperture. All shots on ISO=200. Click image to view full size.
Summary:
I am amazed. I thought that the new lens will be better in every way. Pentax was able to do a good lens!
f=10
f=10 (crop from bottom left corner of first photo)
f=10
f=2.8
f=2.8
f=2.8