Zeiss Biogon
 | |
| Introduced in | 1934 |
|---|---|
| Author | Ludwig Bertele |
| Construction | 8 elements in 5 groups |
| Aperture | 4.5 |
Biogon is the brand name of Carl Zeiss for a series of photographic camera lenses, first introduced in 1934. Biogons are typically wide-angle lenses.
History[]
The first lens branded Biogon (2.8 / 3.5 cm, unbalanced) was designed in 1934 by Ludwig Bertele,[1] then assigned to 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 1951, a new Biogon with a 90° angle of view (Super Wide Angle) was designed, also by Ludwig Bertele.[2] The advent of the Biogon opened the way to extreme wide-angle lenses. The first examples 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 The original patent spanned three different variants, each with a different maximum aperture: f/6.3, f/4.5, and f/3.4 lenses.[2]
Examples[]
Since their introduction, lenses branded Biogon 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 approximately half as long as the format's diagonal.
Well known camera manufacturers like Hasselblad have or had Biogon derived lenses to offer.
The lenses branded (sold by Schneider Kreuznach and 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° angle (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 × 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 4 × 5 inches
Other Zeiss lenses include the Triotar, Biotar, , Tessar, Planar, Sonnar, , , Hologon, Topogon, , .
See also[]
References[]
- ^ a b US patent 2084309, Bertele, Ludwig, "Photographic lens system", issued 22 June 1937, assigned to Zeiss Ikon AG
- ^ a b US patent 2721499, Bertele, Ludwig, "Five component wide-angle objective", issued 25 October 1955, assigned to Bertele, Ludwig
Bibliography[]
- Nasse, H. Hubert (December 2011). "From the series of articles on lens names: Distagon, Biogon and Hologon" (PDF). Camera Lens Blog (CLB) (41st ed.). Carl Zeiss AG, Camera Lens Division. Retrieved 2013-06-08.
(NB. German: [1])
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External links[]
- Photographic lens designs
- Zeiss lenses