Sharpness at 35mm

For this test, the Samyang AF 35mm f/1.4 FE 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 35mm

Centre sharpness is acceptable when shooting wide-open at f/1.4, very good at f/2, and outstanding from f/2.8 onwards. The edges aren't quite as sharp as the centre, with f/4-f/11 producing the sharpest results.

Aperture	Centre Crop	Edge Crop
f/1.4
f/2
f/2.8
f/4
f/5.6
f/8
f/11
f/16