Olympus's pro OM fast telephoto — the Zuiko Auto-T 180mm f/2 ED with extra-low-dispersion glass.
The Olympus OM-System Zuiko Auto-T 180mm f/2 ED is a fast telephoto for the Olympus OM mount, one of the specialist high-speed ED lenses Olympus made for professional and sports use. The Auto-T token marks it as an automatic-diaphragm telephoto and the ED designation indicates extra-low-dispersion glass. It sat at the top of the OM telephoto range as a demanding, high-performance optic.
This is a manual-focus Olympus OM lens with a 180mm focal length and a maximum aperture of f/2, designated Auto-T with ED glass. The very fast f/2 aperture at 180mm made it a large, heavy and complex lens, and the ED element was used to control chromatic aberration. The confirmed specifications are the 180mm focal length, the f/2 maximum aperture, the ED glass and the manual-focus OM mount; element count, filter arrangement and weight are omitted rather than guessed.
A 180mm f/2 delivers powerful subject isolation and reach, cutting through low light and separating subjects strongly from their backgrounds. It suits indoor sport, stage, wildlife and dramatic portraits where speed and reach are both needed. The ED glass keeps colour fringing under control at the wide apertures where such a lens is most used, giving clean, high-contrast results.
This is a rare, professional-grade OM lens that appears infrequently and commands very high prices among collectors and users. Inspect the large glass carefully for haze, fungus and separation, verify the ED element and coatings are clean, and confirm the aperture blades are dry and responsive. Check the heavy focus mechanism for smooth travel and the tripod mount if fitted. It is a coveted adaptation on mirrorless, so expect strong demand and premium pricing.