Leica Summilux 28mm F1.4 ASPH | Leica M Lens | Black | 11668

Description

Leica Summilux-M 28mm f/1.4 ASPH Black Anodized Lens is the first Leica-M lens to combine an aperture of f1.4 with the popular 28mm wide-angle focal length. The Summilux-M 28mm f1.4 offers excellent image performance over the entire image field even at full aperture and in the close-up range thanks to a floating element. With its outstanding contrast, the lens delivers the same high performance level of the Summilux-M 35mm f1.4 ASPH.

At full aperture in 35mm format it is a maximum of around 3.4 stops, around 2 stops on Leica M8 models with their slightly smaller format. Stopping down further doesn't bring about any notable reduction as essentially only the natural vignetting remains. A total of ten lens elements are used to achieve a low distrotion of a maximum of 1.1%. To correct colour defects, seven of these are made of glass types with colour dispersion (partial dispersion) while one has an aspherical surface. To maintain performance in the close-up range, one element towards the rear of the optical system is a 'floating element' that moves independently of the rest of the mechanism.