Leica Summilux-M 21mm f/1.4 ASPH. Lens

Used Cat #2719445 • MFR #11-647
Leica
Key Features
  • Leica M-Mount Lens
  • Aperture Range: f/1.4 to f/16
  • Two Aspherical Elements
  • Five Low Dispersion Elements
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.
Used
Condition: 9+ Little to no signs of wear
Preowned equipment that shows little to no signs of wear
Note: ser-8 in hood w/case (box)
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Leica 11-647 Overview

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.

Leica 11-647 Specs

Focal Length
21.6mm
Color
Black
Focal Length
21mm
Aperture
f/1.4 to f/16
Maximum Aperture
f/1.4
Camera Mount Type
Leica M
Minimum Aperture
f/16
Angle of View
92°
Minimum Focus Distance
2.3' / 70 cm
Lens Mount
Leica M
Reproduction Ratio
1:29
Optical Design
10 elements in 8 groups
Angle of View
92°
Diaphragm Blades
Not specified by manufacturer
Focus
Manual
Filter Thread
N/A (male thread to accept included lens hood; lens hood accepts Series 8 filters)
Minimum Focus Distance
2.3' / 70 cm
Dimensions
2.7 x 2.6" / 69.5 x 66.0 mm
Weight
1.3 lb / 580 g
Macro Reproduction Ratio
1:29
Optical Design
10 Elements in 8 Groups
Focus Type
Manual Focus
Filter Size
No
Dimensions (ø x L)
2.7 x 2.6" / 69.5 x 66 mm
Weight
1.3 lb / 580 g

Leica 11-647 Reviews

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