The Tair-3 300 mm f/ 4.5 (Russian: "Таир") (export model Tair-3) is a telephoto prime lens for 35 mm SLR cameras with M39 and M42 screw mounts.
There were modifications with single-layer and multilayer coatings (the latter marked "MC").
In 1958 at the World's Fair in Brussels the set of lenses, the Tair-3 300 mm f/ 4.5 being a part of it, was awarded the Grand Prix. The fact was reflected in the form of a commemorative inscription on the frame of earlier Tair lenses
The Tair-3 300 mm f/ 4.5 was manufactured at three plants:
Tair-3 4.5/300 – S. A. Zverev Krasnogorsk Mechanical Plant (KMZ).
Tair-3A 4.5/300 - Zagorsk Optical Mechanics Plant, Sergiyev Posad (ZOMZ). This version features an interchangeable mount.