Sharpness at 12mm

For this test, the Sony FE 12-24mm F4 G lens was attached to a Sony A7R II 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 12mm

Centre sharpness remains high through from f/4 to f/16, with f/22 being adversely affected by diffraction. The edges are almost as sharp as the centre, with f/5.6-f/11 producing the sharpest results.

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