Sharpness at 21mm

The sharpness tests for this review were carried out using a real-world subject rather than a test chart. The Samyang 21mm f/1.4 ED AS UMC CS lens was attached to a Sony A6000 body, which in turn was mounted on a sturdy tripod. Self-timer mode was activated. Slight tonal changes are due to slight changes in natural light during the session.

The full frame at 21mm

Centre sharpness is outstanding between f/2 and f/11, with some softness evident wide open at f/1.4. At f/16 and f/22 sharpness is beginning to drop off a little. The edges aren't quite as sharp, with the best results obtained between f/4-f/11.

Aperture	Centre Crop	Edge Crop
f/1.4
f/2
f/2.8
f/4
f/5.6
f/8
f/11
f/16
f/22