Tair (lens)
Encyclopedia
Tair is the name of a series of 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....

es manufactured by KMZ
Krasnogorskiy Zavod
Krasnogorskiy zavod im. S. A. Zvereva is a Russian factory in Krasnogorsk near Moscow which specializes in optical technology.During the Soviet period it was called Krasnogorsk Mechanical Works...

 in the Soviet Union
Soviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

.

Tair 11

The Tair 11 series have a 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...

 of 135mm with a maximum aperture of f/2.8
F-number
In optics, the f-number of an optical system expresses the diameter of the entrance pupil in terms of the focal length of the lens; in simpler terms, the f-number is the focal length divided by the "effective" aperture diameter...

. Variants include the Tair 11A for the M42 lens mount
M42 lens mount
The M42 lens mount is a screw thread mounting standard for attaching lenses to 35 mm cameras, primarily single-lens reflex models. It is more accurately known as the M42 × 1 mm standard, which means that it is a metric screw thread of 42 mm diameter and 1 mm thread pitch...

 and the original Tair 11 for the M39 lens mount
M39 lens mount
The M39 lens mount is a screw thread mounting system for attaching lenses to 35 mm cameras, primarily rangefinder Leicas. It is also the most common mount for Photographic enlarger lenses....

. The Tair 11-T is a tropicalized version for aerial photography. The Tair 11-2 is an M42
M42 lens mount
The M42 lens mount is a screw thread mounting standard for attaching lenses to 35 mm cameras, primarily single-lens reflex models. It is more accurately known as the M42 × 1 mm standard, which means that it is a metric screw thread of 42 mm diameter and 1 mm thread pitch...

 lens with a focal length of 133mm. A unique feature of the Tair 11 series is the twenty aperture blades
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...

, far more than many modern lenses.

Tair 3

The Tair 3 is a 300mm f/4.5 telephoto lens. Like many other Tair lenses, it uses the M42 lens mount
M42 lens mount
The M42 lens mount is a screw thread mounting standard for attaching lenses to 35 mm cameras, primarily single-lens reflex models. It is more accurately known as the M42 × 1 mm standard, which means that it is a metric screw thread of 42 mm diameter and 1 mm thread pitch...

. Although these are mostly black coloured lenses, there exist some very rare light grey ones manufactured earlier. The lens enjoys a reputation of having excellent image quality

External links

In Russian
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