Sharpness at 14mm

The sharpness tests for this review were carried out using a real-world subject rather than a test chart. The Samyang AF 14mm F2.8 RF lens was attached to a Canon EOS RP camera 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 14mm

The centre is pretty soft when shooting wide open at f/2.8, very good at f/4, with the peak performance achieved in the f/5.6-f/11 range. Diffraction starts to set in at at f/16. The edges are also soft from f/2.8-f/4, sharpening up at f/5.6, with f/8-f/11 the optimum settings.

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