To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
Show all languages
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.

From Wikipedia, the free encyclopedia

Zeiss Sonnar
Introduced in1932
AuthorLudwig Bertele
Construction7 elements in 3 groups
Aperturef/1.5 (1932)

The Zeiss Sonnar is a photographic lens originally designed by Dr. Ludwig Bertele in 1929[1] and patented by Zeiss Ikon.[2] It was notable for its relatively light weight, simple design and fast aperture.

The name "Sonnar" is derived from the German word "Sonne", meaning sun. It was originally a tradename owned by Nettel Camerawerke [de] in Sontheim am Neckar [de] for a f/4.5 Tessar-like lens.[citation needed] Sontheim's coat of arms includes a symbol of the sun. Nettel merged with August Nagel's Contessa Camerawerke [de] in 1919. The resulting Contessa-Nettel [de] AG in Stuttgart was one of the companies that merged to form the Zeiss Ikon AG in 1926.

When the modern Zeiss lens had been designed by Bertele, Zeiss re-used the old Nettel tradename in order to build on the sun association to emphasize on the lens' large aperture (f/2.0), which was much greater than many other lenses available at the time.

The first Zeiss production Sonnar was a 1:2.0 50 mm lens with six elements in three groups created for the Zeiss Contax I rangefinder camera in 1932. In 1931, it was reformulated with seven elements in three groups allowing a maximum aperture of f/1.5.

Compared to Planar designs the Sonnars had more aberrations, but with fewer glass-to-air surfaces it had better contrast and less flare. Though compared to the earlier Tessar design, its faster aperture and lower chromatic aberration was a significant improvement.

The Sonnar has proved to be incompatible in shorter focal lengths with 35mm single-lens reflex (SLR) cameras due to the space taken up by an SLR's mirror. For this reason it has been used most commonly with rangefinder cameras, though Sonnar lenses with longer focal lengths still appear on SLR cameras, most notably the 150 mm and 250 mm lenses for the medium format (MF) Hasselblad V-system. Some portrait Sonnars were also made for large format (LF) cameras, presumably the press cameras – like Sonnar 1:5.6 250 mm for 9×12 cm (4×5") format. Though these lenses were quite heavy (> 2 kg) and large, they were optimised for working on a full aperture with the same sharpness and contrast as on smaller apertures. The coverage of these lenses was also not as good as many similar focal length lenses which limited the use of camera movements. although these are not generally too important for portrait work.

The Sonnar design has been extensively copied by other lens manufacturers, due to its excellent sharpness, low production cost and fast speed. The Soviet factory KMZ produced several lenses that used the Sonnar formula: The KMZ Jupiter 3, Jupiter-8, and Jupiter-9 are direct copies of the Zeiss Sonnar 1:1.5 50 mm, 1:2.0 50 mm and 1:2.0 85 mm respectively.

A zoom lens derivative of the Sonnar, the Vario-Sonnar also exists, in which a number of lens groups are replaced with floating pairs of lens groups.

The Vario-Sonnar is a Carl Zeiss photographic lens design named in relation to the Zeiss Sonnar. This lens type has a variable focal length which can replace a series of lenses for a certain picture format.

A Sonnar 135 mm f/3.5 from Carl Zeiss Jena
Zeiss Sonnar 135 mm f/2.8 telephoto lens.

YouTube Encyclopedic

  • 1/3
    98 291
    16 568
    8 795
  • Zeiss 24mm F/1.8 Sonnar T* Lens Overview
  • 😍 Glass Perfection REVIEW: ZEISS Apo Sonnar 135mm f/2
  • Are 35 yr old Carl Zeiss really that good? Testing Contax lenses out!


See also

External links

Vario-Sonnar diagram


This page was last edited on 26 November 2020, at 13:56
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.