The black Summicron-SL 50mm f/2 ASPH. Lens from Leica is a wide-angle prime that puts image quality and refined optical design inside a compact, lightweight package. Designed for full-frame L-mount mirrorless cameras, the lens is comprised of nine elements in eight groups, and the three aspherical elements greatly reduce chromatic aberrations and distortions for notable image sharpness and clarity. The lens's f/2 maximum aperture benefits working in a variety of lighting conditions while offering precise control over focus position for working with shallow depth of field techniques, and a quiet and precise autofocus motor benefits both stills and video capture. Well-suited for nearly any photographic application, this compact, 14.2 oz workhorse is constructed with a metal body and weather-sealing for durability and protection in harsh environments and inclement weather conditions. Wide-angle 50mm L-mount prime designed for full-frame mirrorless cameras.Consistent f/2 maximum aperture for working in difficult lighting conditions. Three aspherical elements reduce chromatic and spherical aberrations for increased image sharpness and clarity.