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]]. | + | 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]] (Rochester), [[Ross]] (London) and [[Krauss]] (Paris). |
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: | ||
| − | + | <br> [[Agfa]] Solinar | |
| − | + | <br> Asahi/[[Pentax]] Macro-Takumar 50mm f/4 | |
| − | + | <br> [[Bausch & Lomb]] Tessar (under license) | |
| − | + | <br> [[Canon]] 38mm FLP, 50mm f/2.8 and f/3.5 RF lenses, 50mm FL f/3.5 | |
| − | + | <br> [[Dallmeyer]] Dalmac, Perfac, Serrac | |
| − | + | <br> [[Ernemann]] Ernon | |
| − | + | <br> [[FED]]/[[KMZ]] Industar | |
| − | + | <br> [[Ilex]] Paragon | |
| − | + | <br> [[Kodak]] Ektar | |
| − | + | <br> [[Konica]] Macro-Hexanon AR 55 mm f/3.5 | |
| − | + | <br> [[Krauss]]-Zeiss Tessar (under license) | |
| − | + | <br> [[Leitz]] Elmar | |
| − | + | <br> [[Mamiya]] Press lenses - 100mm f/3.5, 127mm f/4.7, 150mm f/5.6 | |
| − | + | <br> [[Meyer]] Primotar | |
| − | + | <br> [[Minolta]] Rokkor TLR | |
| − | + | <br> [[Minox]] Minoxar | |
| − | + | <br> [[Nikon]] 45mm GN Nikkor, El-Nikkor 50mm f/4 | |
| − | + | <br> [[Plaubel]] Anticomar | |
| − | + | <br> [[Rodenstock]] Ysar, Rogonar | |
| − | + | <br> [[Ross]] Xtralux | |
| − | + | <br> Ross Tessar (under license) | |
| − | + | <br> [[Schneider]] Xenar, Comparon | |
| − | + | <br> [[Taylor-Hobson|Taylor & Hobson]] Apotal, Ental | |
| − | + | <br> [[Voigtlander]] Heliostigmat, Skopar | |
| + | <br> [[Wollensak]] Raptar | ||
| + | <br> [[Yashica]] Yashinon TLR | ||
==Sources== | ==Sources== | ||
Revision as of 18:52, 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 (Rochester), Ross (London) and Krauss (Paris).
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
Ilex Paragon
Kodak Ektar
Konica Macro-Hexanon AR 55 mm f/3.5
Krauss-Zeiss Tessar (under license)
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
Ross Tessar (under license)
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
