Leica
90mm f/2 APO-Summicron R ASPH
Medium-Telephoto Lens
A useful mid-telephoto lens, the 90mm f/2 APO-Summicron R ASPH from Leica is an impressive imaging tool. Featuring apochromatic correction and a CNC machined aspherical lens surface, it offers enhanced imaging performance in a compact design that weighs just 520 g.
This aspherical lens is complimented by two high-refractive glass elements and two high anomalous dispersion lens elements to produce images with a high degree of clarity and detail. The residual chromatic aberrations that occur at long focal lengths and high speeds are effectively avoided by the apochromatic correction. The imaging quality is consistently high over the whole image field even at the widest aperture and can only be enhanced slightly by stopping down a stop. Distortion is so slight that it is practically undetectable and any slight vignetting disappears completely from f/4 onwards.
The lens features a built-in telescopic lens hood that can be locked in its extended position by rotation. It accepts 60mm screw-in type filters.