Overview

The Leica Super-Elmar-M 21mm f/3.4 ASPH is widely praised as one of Leica's best ultrawide lenses, offering exceptional sharpness across the frame, negligible distortion, and high flare resistance. It is compact, lightweight, and takes common 46mm filters. Weaknesses include significant vignetting, especially in skies, requiring manual correction, and slight chromatic aberration at f/3.4 in high contrast. Build quality is solid brass with smooth focus and a focusing tab. It suits photographers seeking a portable, optically superb ultrawide for digital Leica M cameras, particularly for landscape and street photography.