The Summilux-M 21mm f/1.4 ASPH is an extraordinary lens: large, fast, and versatile, capable of offering exceptional image quality. The bright and fast maximum aperture of f/1.4 presented by this lens is ideal for working in low light conditions and for enjoying greater control over depth of field. The super wide-angle focal length is complemented by the use of five anomalous partial dispersions and a pair of aspherical elements to abolish chromatic and spherical aberrations to provide a high degree of sharpness and clarity with well-controlled vignetting and distortion. The optical design also incorporates a system of floating elements capable of providing consistent image quality throughout the entire focus range. The front of the lens is threaded, allowing for the inclusion of an included rectangular-shaped lens hood. Ideal for: Summilux-M 21mm f/1.4 ASPH is, overall, a truly excellent lens. Thanks to its compact and lightweight design, it is an ideal lens for creating street photography and reportage. It manages to capture images of excellent quality, sharp, and breathtaking colors at all apertures and at all distances within its ultra-wide field. This lens is suitable for those who are looking for a lens that is able to offer excellent performance and, at the same time, can afford its high price.