The Leica 21mm F1.4 Summilux ASPH is the first of its kind lens offers ultra fast aperture of f1.4 at wide focal length of 21mm. The lens is a versatile performer and at its full aperture offers extremely shallow depth of field. It also incorporates a series of anomalous partial dispersion glass elements, and one aspherical element to help to control color fringing and various aberrations for improved clarity and sharpness. A floating elements system is used for maintained image quality throughout the focusing range to ensure maximum performance.
I have had the pleasure of owning both the Leica 21mm F3.4 Super-elmar ASPH and Leica 21mm F1.4 Summilux ASPH.
Although the Leica 21mm F1.4 Summilux is a much larger and heavier lens, it offers much more depth-of-field when shooting subjects at closer distance. It is a Lengendary Leica wide angle lens and unique due to its large aperture and capability to shoot in low light.
The Leica 21mm F1.4 Summilux ASPH lens offers very sharp images with distinct Leica colours. The contrast and colour rendition is excellent towards saturated side. The lens exhibits minimum distortion, chromatic aberration and vignetting due to its lens design.
When shooting closer subjects at its widest aperture, the Leica 21mm F1.4 Summilux offers great separation of the subject from its background and produces pleasant and smooth bokeh.
The Leica 21mm F1.4 Summilux ASPH is a large and heavy lens due to been a ultra-fast wide angle requires to carry a large portion of glass. The lens specifications is stated below and when mounting the lens on Leica M Camera bodies, it can feel front-heavy due to its size and weight.
However, the lens is extremely well-built to Leica highest build quality and feels solid during practical use on hands. The aperture ring clicks in place firmly and the focus ring is very smooth when turning. Overall, it is one of the highest quality wide angle lens you can get from Leica.
Lens Code: 11 647
Production Year: 2008 - Present
Construction: 10 Elements / 8 Groups
Design Features: 1 Aspherical Element, 5 Low Dispersion Elements and 1 Floating Elements System
Maximum / Minimum Aperture: F1.4 - F16
Closet Focusing Distance: 0.7m
Filter Size: Series VIII Filter in Lens Hood
Dimensions (Diameter x Length): 70mm x 66mm
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The Leica 21mm F1.4 Summilux ASPH is a wide-angle prime features a bright and fast maximum aperture to benefit working in low-light conditions and for greater control over depth of field. The lens design and construction overall contribute to maximum performance and offers unique Leica rendering.