Zeiss Biogon

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Leica CL with Carl Zeiss Biogon 2,8 / 28mm lens
Zeiss Biogon 2,8 / 21mm lens

Biogon is a brand name of Carl Zeiss for a series of photographic camera lenses. Biogons are typically wide angle lenses.

The first Biogon (2.8 / 3.5 cm, unbalanced) was created in 1935 by Ludwig Bertele, then referenced by designer Zeiss Ikon Dresden, the Contax created as a modification of the then Sonnar. It was developed by Carl Zeiss in approximately 1937 and manufactured in Jena, then a redesign in Oberkochen. In 1954, a new Biogon with a 90° angle (Super Wide Angle) was also designed by Ludwig Bertele for Carl Zeiss, which opened the way to extreme wide angle lenses. They were produced from 1954 as the 4.5 / 21 mm for Contax, in 1954. 4,5/38 mm for Hasselblad Super Wide, and from 1955 to 1956 as the 4.5 / 53 mm and 4.5 / 75 mm for the Linhof.

Since then, they are usually approximately symmetrical ("semi-symmetrical") wide-angle design with a usable angle of view of 90° or more. At 90° the focal length is about half as long as the format's diagonal.

Well-known camera manufacturers like Hasselblad have or had Biogon derived lenses to offer.

The lenses of the type Super-Angulon (Schneider Kreuznach, Leica Camera) are based on the construction of the Biogon.

Other Zeiss lenses include the Biotar, Tessar, Planar, Sonnar, Distagon (de), Flektogon (de), Hologon.

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