Super-Elmar-M 21mm f/3.4 ASPH.
A versatile wide-angle prime for Leica M-mount rangefinder cameras, the Super-Elmar-M 21mm f/3.4 ASPH. features a sophisticated optical design and compact form factor. Its super-wide field of view makes it a great choice for landscapes or dynamic closeup shots.
The optical design uses one double-sided aspherical element and four anomalous partial dispersion elements to minimise spherical and chromatic aberrations for consistently sharp results throughout the aperture range. The aspherical element also contributes to the lens's compact form factor, and the manual focusing design permits working with subjects as close as 70 cm away.