Product Code: 11668
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.
|Angle of view (diagonal, horizontal, vertical)||75°, 65°, 46°|
|Number of lenses/groups||10-Jul|
|Position of entrance pupil||31.9 mm (related to the first lens surface in light direction)|
|Focusing range||0.7 m to infinity|
|Scales||Combined meter/feet graduation|
|Smallest object field||526 x 789 mm|
|Largest reproduction ratio||01:21.9|
|Setting/Function||Prefix with click-stops, half steps|
|Bayonet||Leica M quick-change bayonet|
|Lens hood||External thread with stop for screw on lens hood (included)|
|Largest diameter||approx. 61 mm|
|Weight||approx. 440 g|