Olympus's high-grade OM zoom — the Zuiko Auto-Zoom 35-80mm f/2.8 ED, fast constant aperture.
The Olympus OM-System Zuiko Auto-Zoom 35-80mm f/2.8 ED is a fast constant-aperture standard zoom for the Olympus OM mount, one of the most advanced zooms Olympus made for the system. The Auto-Zoom token marks the automatic diaphragm and the ED designation indicates extra-low-dispersion glass. It was a high-grade professional zoom that has become a sought-after collector's item.
This is a manual-focus Olympus OM zoom with a 35-80mm focal range and a constant maximum aperture of f/2.8, designated Auto-Zoom with ED glass. The bright constant f/2.8 aperture holds across the range, and the ED element was used to control chromatic aberration. The verifiable specifications are the 35-80mm focal range, the constant f/2.8 maximum aperture, the ED glass and the manual-focus OM mount; element count, filter thread and weight are omitted rather than guessed.
A fast 35-80mm f/2.8 covers the core standard range with a bright aperture, giving low-light capability and subject separation across wide, normal and short-telephoto focal lengths. It suits portraits, travel, events and general work where one high-quality zoom can replace several primes. The ED glass keeps fringing low, and the constant aperture makes it easy to work with in manual exposure.
This high-grade zoom is scarce and among the most desirable OM zooms, so it commands high prices when it appears. Inspect the glass for haze, fungus and separation, confirm the ED coatings are clean, and check the aperture blades are dry and snappy. Test the zoom and focus actions for smooth, even travel with no play. It is a prized adaptation on mirrorless for its fast constant aperture, so expect strong demand and premium pricing.