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Zeiss Biogon : ウィキペディア英語版
Zeiss Biogon

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.
* (Biogon 1:2,8 f=21 mm ), 90° Angle (PDF-File; 65 kB)
* (Biogon 1:4,5 f=21 mm, T
* Classic
), 90° Anglel (PDF-File; 282 kB)
* (Biogon 1:2,8 f=25 mm ), 82° Angle (PDF-File; 292 kB)
* (Biogon 1:2,8 f=28 mm ), 75° Angle (PDF-File; 182 kB)
* (Biogon 1:2,0 f=35 mm ), 63° Angle (PDF-File; 266 kB)
* (Biogon 1:4,5 f=38 mm CFi ) for Hasselblad (Medium Format; PDF-File; 166 kB)
* Biogon 1:4,5 f=53 mm, image diameter of 115 mm, for professional cameras up to the 6 x 9 cm
* (Biogon 1:5,6 f=60 mm ) for Hasselblad (Medium Format, including the Apollo moon mission, PDF file, 857 kB); PDF-File; 857 kB)
* Biogon 1:4,5 f=75 mm, image diameter of 153 mm, 92° angle, for large-format professional cameras up to 4x5 inches
Other Zeiss lenses include the Biotar, Tessar, Planar, Sonnar, , , Hologon.
==See also==

*Biotar
*Tessar
*Planar
*Sonnar
*
*
*Hologon

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Zeiss Biogon」の詳細全文を読む



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