The Zeiss Planar is a photographic lens designed by Paul Rudolph at Carl Zeiss in 1896. Rudolph's original was a six-element symmetrical double Gauss lens design.
While very sharp, early versions of the lens suffered from flare due to its many air-to-glass surfaces. Before the introduction of lens coating technology, the four-element Tessar, with slightly inferior image quality, was preferred due to its better contrast. In the 1950s, when effective anti-reflective lens coatings became available, coated Planars were produced with much-improved flare resistance. These lenses used the Zeiss T coating system, which had been invented by Olexander Smakula in 1935. They performed very well as normal and medium-long focus lenses for small and medium format cameras. One of the most notable Planar lenses is the high-speed f/2.0/110 mm lens for the 2000- and 200-series medium format Hasselblad cameras with a similar version available for the Rolleiflex 6000 series cameras.
See also
- Carl Zeiss Planar 50mm f/0.7
- Biotar
- Tessar
- Sonnar
- Biogon
- Distagon
- Flektogon
- Hologon
- Photographic lens design
Further reading
- Nasse, H. Hubert (July 2011). "From the series of articles on lens names: Planar" (PDF). Camera Lens Blog (CLB) (40th ed.). Carl Zeiss AG, Camera Lens Division. Retrieved 2013-06-08.
(NB. German: [1])
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References
- Carl Zeiss lenses [2]
- Carl Zeiss SLR Lenses - Planar T* 1,4/50 [3]
