| 词条 | Zeiss Planar |
| 释义 |
|scheme = Planar 1896.png |author = Paul Rudolph |year = 1896 |elements = 6 |groups = 4 |aperture = {{f/}}4.5 }} The Zeiss Planar is a photographic lens designed by Paul Rudolph at Carl Zeiss in 1896. Rudolph's original was a six-element symmetrical 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.[1] 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. {{Multiple image|align=left |direction=horizontal |header= |footer= |width1=220 |image1=Planar lenses 7050.jpg |alt1=Carl Zeiss T* Planar 50/1.4, 50/1.7 |caption1=Carl Zeiss T* Planar 50/1.4, 50/1.7 |width2=220 |image2=Planar 50-1.4.png |alt2=Carl Zeiss T* Planar 50/1.4 lens |caption2=Carl Zeiss T* Planar 50/1.4 lens }}{{-}} See also
Further reading
|title=From the series of articles on lens names: Planar |first=H. Hubert |last=Nasse |work=Camera Lens Blog (CLB) |edition=40th |date=July 2011 |publisher=Carl Zeiss AG, Camera Lens Division |url=http://blogs.zeiss.com/photo/en/wp-content/uploads/2011/07/en_CLB_40_Nasse_Lens_Names_Planar.pdf |quote=(NB. German: ) |accessdate=2013-06-08}} References1. ^History of Camera Lenses from Carl Zeiss - 1935 - Alexander Smakula develops anti-reflection coating
2 : Photographic lens designs|Zeiss lenses |
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