Sigma 50mm F1.2 DG DN | Art (L-Mount)

Reviewers found it very sharp in the centre at f/1.2, with the corners a little softer until about f/2.8, and a flat field. Longitudinal colour fringing is negligible for the aperture and lateral fringing very low, coma is well corrected and flare is hard to provoke even with the sun in frame. Bokeh is large and smooth with no onion-ring texture, and the 13 blades keep highlights round when stopped down. Autofocus is quick, silent and accurate for stills and video, and breathing is lower than Sigma's own 50mm F1.4 Art.

The main weakness is vignetting in the full-frame corners wide open, which Lenstip measured as very high. Some note slight green/blue fringing on high-contrast edges at f/1.2, that it is still large and slightly front-heavy on small bodies, and that depth of field at f/1.2 needs careful focus placement. Most conclude it competes with Sony's 50mm f/1.2 GM for considerably less money.