The Tair 11 series have a focal length of 135mm with a maximum aperture of f/2.8. Variants include the Tair 11A for the M42 lens mount and the original Tair 11 for the M39 lens mount. The Tair 11-T is a "Technical" or "Television" for cinecamera or surveillance.The Tair 11-2 is an M42 lens with a focal length of 133mm. A unique feature of the Tair 11 series is the twenty aperture blades, far more than many modern lenses.
The Tair 3 is a 300mm f/4.5 telephoto lens. Like many other Tair lenses, it uses the M39/M42 lens mount. 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
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