Biogon
Biogon is a trademark of the company Carl Zeiss for a series of photographic camera lenses (including specialist lenses ). Biogons are typically wide-angle lenses .
The first Biogon (2.8 / 3.5 cm, asymmetrical) was created in 1935 by Ludwig Bertele , then an optics designer at Zeiss Ikon Dresden , for Contax as a modification of the Sonnar at that time . It was produced by Carl Zeiss in Jena until around 1949 , after which it was recalculated in Oberkochen . In 1951, a new Biogon with a 90 ° image angle (super wide angle) was also calculated by Ludwig Bertele for Carl Zeiss, which paved the way for extreme wide angle lenses. The B. 4.5 / 21 mm for the Contax were manufactured from 1952, the B. 4.5 / 38 mm for the Hasselblad Superwide in 1954 and the B. 4.5 / 53 mm and 4.5 / 75 from 1955 and 1956 mm to the Linhof .
Since then it has been a mostly approximately symmetrical wide-angle construction with a usable angle of view of sometimes over 90 °. At 90 ° the focal length is about half as long as the format diagonal.
Well-known camera manufacturers such as Hasselblad, Alpa and Linhof have or carried Biogon lenses in their lens range.
The lenses of the Super-Angulon design ( Schneider Kreuznach , Leitz ) are also based on the construction of the Biogons.
- Biogon 1: 2.8 f = 21 mm, 90 ° angle of view
- Biogon 1: 4.5 f = 21 mm, T * Classic, 90 ° angle of view
- Biogon 1: 2.8 f = 25 mm, 82 ° angle of view
- Biogon 1: 2.8 f = 28 mm, 75 ° angle of view
- Biogon 1: 2.0 f = 35 mm, 63 ° angle of view
- Biogon 1: 4.5 f = 38 mm CFi for Hasselblad ( medium format )
- Biogon 1: 4.5 f = 53 mm, image circle diameter 115 mm, for view cameras with a format of up to 6 cm × 9 cm
- Biogon 1: 5.6 f = 60 mm for Hasselblad (medium format, including Apollo moon mission )
- Biogon 1: 4.5 f = 75 mm, image circle diameter 153 mm, 92 ° image angle, for view cameras up to max. 4 "× 5"
Individual evidence
Web links
- In-depth article on the history of super wide-angle lenses, starting with the Hypergon (Italian)
- Biogon in the article 'Wide Angle Lens' at olypedia.de
- Historical data sheets for Zeiss lenses
See also
Sonnar , first Biogon 1: 2.8 f = 3.5 cm derived from the 50 mm Sonnar or its predecessor Ernostar (both Ludwig Bertele)