Mir (lens)
Encyclopedia
Wide Angle
Wide Angle is the debut studio album by British breakbeat trance producers Hybrid, and was re-released in 2000 as a double-CD edition entitled Wider Angle...
prime lens
Prime lens
In film and photography, a prime lens is either a photographic lens whose focal length is fixed, as opposed to a zoom lens, or it is the primary lens in a combination lens system....
series with focal length
Focal length
The focal length of an optical system is a measure of how strongly the system converges or diverges light. For an optical system in air, it is the distance over which initially collimated rays are brought to a focus...
s varying from 20 to 37 mm with 5-7 elements.
The first variant was the Mir-1 and won the Grand Prix at Expo '58
Expo '58
Expo 58, also known as the Brussels World’s Fair, Brusselse Wereldtentoonstelling or Exposition Universelle et Internationale de Bruxelles, was held from 17 April to 19 October 1958...
in Brussels
Brussels
Brussels , officially the Brussels Region or Brussels-Capital Region , is the capital of Belgium and the de facto capital of the European Union...
. Its construction was derived from the Flektogon lens by Carl Zeiss
Carl Zeiss
Carl Zeiss was a German maker of optical instruments commonly known for the company he founded, Carl Zeiss Jena . Zeiss made contributions to lens manufacturing that have aided the modern production of lenses...
. The first element in this lens is in fact a disperser meniscus
Meniscus
The meniscus is the curve in the upper surface of a liquid close to the surface of the container or another object, caused by surface tension. It can be either convex or concave. A convex meniscus occurs when the molecules have a stronger attraction to each other than to the material of the...
to reduce vignette
Vignetting
In photography and optics, vignetting is a reduction of an image's brightness or saturation at the periphery compared to the image center. The word vignette, from the same root as vine, originally referred to a decorative border in a book. Later, the word came to be used for a photographic...
effects when photographing with an open diaphragm
Diaphragm (optics)
In optics, a diaphragm is a thin opaque structure with an opening at its center. The role of the diaphragm is to stop the passage of light, except for the light passing through the aperture...
.