Leica Summarit-S 1:2.5/35 ASPH.
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This fast, wide-angle lens is available with or without a central shutter and operates practically without distortion. It is therefore ideal for use indoors or for architectural photos. The SUMMARIT-S 1:2.5/35 mm ASPH. uses two aspherical lens surfaces and special glass with anomalous partial dispersion or high refraction as well as rear-group focusing for the highest performance over the entire focusing range.
The angle of view of this fast, wide-angle lens is equivalent to that of a 28 mm lens in 35 mm format and makes it an ideal lens for studio work and architectural photography. Maximum contrast performance is guaranteed, even at maximum aperture. Its sophisticated design and construction almost completely eliminate undesirable effects like distortion or chromatic aberration. The Leica Summarit-S 35 mm f/2.5 ASPH.
The optical design of the Leica Summarit-S 35 mm f/2.5 ASPH. features a total of 11 lens elements. Of these, two are made from glasses with anomalous partial dispersion and another three with low dispersion. This reduces chromatic aberration effects to a minimum. In addition, two elements with elaborately ground and polished aspherical surfaces ensure extremely low distortion. And finally, rear-group focusing guarantees perfect imaging properties throughout the entire focusing range.
Lenses/groups: 11/9 (2 aspherical surfaces)
Optical design: Rear-group focusing
Image angle: (diagonal, horizontal, vertical) approx. 75°, 65°, 46°, approx. corresponds to 28mm in 35mm format
Aperture range: 2.5 to 22
Shortest distance: 0.55 m
Largest image scale: 1:11
Filter thread size: 82 mm
Dimensions (diameter/length): 88 mm/122 mm
Weight: 930g (1080g)
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