Leica APO-Summicron-M 90 mm f/2 ASPH
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Apochromatic color correction and an aspherical lens surface are combined for the first time in a lens of this type. Of its five individual elements, two are made of high-refraction glass, while two others feature anomalous partial dispersion. Its brilliance and quality of resolution are exemplary even at full aperture. Light falloff is very low. The fast aperture of the APO-Summicron-M 90mm f/2 lets you shoot at relatively short exposure times even in dim light, helping to minimize the effects of camera shake.
Focal length 90.9mm Filter size E55 Aperture ratio 1:2 Lens construction 5 elements, 5 groups Focus range ∝-0.7 m Weight 500g