Overview

The Sigma 20mm F1.4 DG HSM Art is a groundbreaking ultra-wide prime offering an unprecedented f/1.4 aperture at 20mm, praised for excellent sharpness and low-light capability. Its build is robust but heavy (950g) and lacks weather sealing, a concern for landscape shooters. The fixed hood and bulbous front element prevent screw-in filters. It suits wedding, landscape, and astrophotography enthusiasts who prioritize speed and width over portability.