Difference between revisions of "Tessar"
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The original design had a maximum aperture of f/6.3, but the developments in design allowed f/2.8 by 1930. | The original design had a maximum aperture of f/6.3, but the developments in design allowed f/2.8 by 1930. | ||
| − | + | In addition to production by [[Carl Zeiss]], the Tessar name and design (under license) was used in the production of numerous lenses by [[Bausch & Lomb]]. | |
The Tessar design has been widely copied by nearly all major optics companies. | The Tessar design has been widely copied by nearly all major optics companies. | ||
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A very partial list includes: | A very partial list includes: | ||
| − | [[Agfa]] Solinar | + | * [[Agfa]] Solinar |
| − | Asahi/[[Pentax]] Macro-Takumar 50mm f/4 | + | * Asahi/[[Pentax]] Macro-Takumar 50mm f/4 |
| − | [[Bausch & Lomb]] Tessar (under license) | + | * [[Bausch & Lomb]] Tessar (under license) |
| − | [[Canon]] 38mm FLP, 50mm f/2.8 and f/3.5 RF lenses, 50mm FL f/3.5 | + | * [[Canon]] 38mm FLP, 50mm f/2.8 and f/3.5 RF lenses, 50mm FL f/3.5 |
| − | [[Dallmeyer]] Dalmac, Perfac, Serrac | + | * [[Dallmeyer]] Dalmac, Perfac, Serrac |
| − | [[Ernemann]] Ernon | + | * [[Ernemann]] Ernon |
| − | [[FED]]/[[KMZ]] Industar | + | * [[FED]]/[[KMZ]] Industar |
| − | [[ | + | * [[Kodak]] Ektar |
| − | [[ | + | * [[Ilex]] Paragon |
| − | + | * [[Konica]] Macro-Hexanon AR 55 mm f/3.5 | |
| − | [[Konica]] Macro-Hexanon AR 55 mm f/3.5 | + | * [[Leitz]] Elmar |
| − | [[Leitz]] Elmar | + | * [[Mamiya]] Press lenses - 100mm f/3.5, 127mm f/4.7, 150mm f/5.6 |
| − | [[Mamiya]] Press lenses - 100mm f/3.5, 127mm f/4.7, 150mm f/5.6 | + | * [[Meyer]] Primotar |
| − | [[Meyer]] Primotar | + | * [[Minolta]] Rokkor TLR |
| − | [[Minolta]] Rokkor TLR | + | * [[Minox]] Minoxar |
| − | [[Minox]] Minoxar | + | * [[Nikon]] 45mm GN Nikkor, El-Nikkor 50mm f/4 |
| − | [[Nikon]] 45mm GN Nikkor, El-Nikkor 50mm f/4 | + | * [[Plaubel]] Anticomar |
| − | [[Plaubel]] Anticomar | + | * [[Rodenstock]] Ysar, Rogonar |
| − | [[Rodenstock]] Ysar, Rogonar | + | * [[Ross]] Xtralux |
| − | [[Ross]] Xtralux | + | * [[Schneider]] Xenar, Comparon |
| − | [[Schneider]] Xenar, Comparon | + | * [[Taylor-Hobson|Taylor & Hobson]] Apotal, Ental |
| − | Taylor & Hobson Apotal, Ental | + | * [[Voigtlander]] Heliostigmat, Skopar |
| − | [[Voigtlander]] Heliostigmat, Skopar | + | * [[Wollensak]] Raptar |
| − | [[Wollensak]] Raptar | + | * [[Yashica]] Yashinon TLR |
| − | [[Yashica]] Yashinon TLR | ||
==Sources== | ==Sources== | ||
Revision as of 02:58, 27 August 2008
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| Cross-section of a 50mm f2.8 Tessar (for 35mm, M42 fitting) |
The Tessar is a camera lens designed by Dr Paul Rudolph, working for the Carl Zeiss Jena company, in 1902. It is normally used as a standard lens, and has been fitted to many millions of cameras.
The design consists of four elements in three groups; the front element is positive, bi-convex (with the rear almost flat), the central a negative bi-concave and, following an aperture, at the rear is a cemented doublet of plano-concave and a bi-convex elements. Though often referred to as a "modified Cooke triplet", the Tessar is actually a development of Rudolph's 1899 Unar (4 element in 4 groups) lens, itself a development of Rudolph's 1890 Zeiss Anastigmat (4 elements in 2 groups) lens.
The original design had a maximum aperture of f/6.3, but the developments in design allowed f/2.8 by 1930.
In addition to production by Carl Zeiss, the Tessar name and design (under license) was used in the production of numerous lenses by Bausch & Lomb.
The Tessar design has been widely copied by nearly all major optics companies.
A very partial list includes:
- Agfa Solinar
- Asahi/Pentax Macro-Takumar 50mm f/4
- Bausch & Lomb Tessar (under license)
- Canon 38mm FLP, 50mm f/2.8 and f/3.5 RF lenses, 50mm FL f/3.5
- Dallmeyer Dalmac, Perfac, Serrac
- Ernemann Ernon
- FED/KMZ Industar
- Kodak Ektar
- Ilex Paragon
- Konica Macro-Hexanon AR 55 mm f/3.5
- Leitz Elmar
- Mamiya Press lenses - 100mm f/3.5, 127mm f/4.7, 150mm f/5.6
- Meyer Primotar
- Minolta Rokkor TLR
- Minox Minoxar
- Nikon 45mm GN Nikkor, El-Nikkor 50mm f/4
- Plaubel Anticomar
- Rodenstock Ysar, Rogonar
- Ross Xtralux
- Schneider Xenar, Comparon
- Taylor & Hobson Apotal, Ental
- Voigtlander Heliostigmat, Skopar
- Wollensak Raptar
- Yashica Yashinon TLR
Sources
- Rudolf Kingslake, A History of the Photographic Lens, Academic Press, 1989
