Laowa 14mm f/4 FF RL Zero-D (Canon RF)

Testers find the centre sharp from f/4 and excellent around f/8, with distortion very low for a 14mm and lateral chromatic aberration close to absent. Borders are decent, but views on the corners differ: one test found them good from f/5.6, another found edges and corners softer at every aperture and best around f/11. Field curvature is pronounced at close focus distances.

Vignetting is the main weakness, close to 3 EV wide open and still around 2 EV at f/8, and there is no in-camera correction because the lens has no contacts. Sunstars from the five straight blades are long and well defined, and the metal build and smooth focus ring are praised. Flare is generally well controlled, though one test saw a large halo around light sources at f/4. One pre-production test sample had its infinity mark set well past true infinity and an alignment fault.