Sharpness at 35mm

For this test, the Carl Zeiss Sonnar T* FE 35mm F2.8 ZA lens was attached to a Sony A7 body, which in turn was mounted on a sturdy tripod. Exposure delay mode was activated. Tonal and colour variances across the crops are due to changes in natural light during the session.

The full frame at 35mm

Centre sharpness remains high through from f4 to f/16, with f/2.8 a little soft and f/22 being adversely affected by diffraction. The edges are not quite as sharp as the centre, with f4-16 again producing the sharpest results.

Aperture	Centre Crop	Edge Crop
f/2.8
f/4
f/5.6
f/8
f/11
f/16
f/22