Tair is the name of a series of prime lenses manufactured by KMZ in the Soviet Union.
The Tair 11 series have a focal length of 133mm with a maximum aperture of f/2.8.
[2] A unique feature of the Tair 11 series is the twenty aperture blades,[3] far more than many modern lenses.
Although these are mostly black coloured lenses, there exist some very rare light grey ones manufactured earlier.
[5] The lens enjoys a reputation of having excellent image quality.