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Key Features
An impressively wide and fast lens, the Summilux-M 21mm f/1.4 ASPH. from Leica is a versatile M-mount prime delivering exceptional image quality. The super wide-angle focal length is complemented by the use of five anomalous partial dispersion and a pair of aspherical elements to suppress chromatic and spherical aberrations in order to deliver a high degree of sharpness and clarity with well-controlled vignetting and distortion. The optical design also incorporates a floating elements system to provide consistent image quality throughout the focusing range.
Super wide-angle prime features a bright, fast f/1.4 maximum aperture to benefit working in low-light conditions and for greater control over depth of field.
Five anomalous partial dispersion elements reduce color fringing and chromatic aberrations for increased clarity as well as consistent, even illumination and well-corrected vignetting.
Two aspherical elements suppress spherical aberrations and distortion for improved sharpness.
Floating elements system achieves consistent image quality throughout the focusing range, even at the minimum focusing distance of 2.3'.
The front of the lens is male threaded to accept the included lens hood and the hood is designed to accept Series 8 filters.
| Focal Length | 21mm |
| Maximum Aperture | f/1.4 |
| Minimum Aperture | f/16 |
| Lens Mount | Leica M |
| Angle of View | 92° |
| Minimum Focus Distance | 2.3' / 70 cm |
| Macro Reproduction Ratio | 1:29 |
| Optical Design | 10 Elements in 8 Groups |
| Focus Type | Manual Focus |
| Filter Size | None |
| Dimensions (ø x L) | 2.7 x 2.6" / 69.5 x 66 mm |
| Weight | 1.3 lb / 580 g |
Packaging Info
| Package Weight | 2.6 lb |
| Box Dimensions (LxWxH) | 11.5 x 7.5 x 6.1" |