Olympus's OM telephoto — 100mm f/2.8 E.Zuiko for portraits and moderate telephoto work.
The Olympus E.Zuiko 100mm f/2.8 is a portrait telephoto prime from the Olympus OM system for 35mm SLR cameras. The E.Zuiko designation indicates a 5-element optical formula (E = 5 in the Japanese alphabetical element-count naming). A compact and capable portrait prime. Olympus OM mount.
f/2.8 maximum aperture. 100mm focal length (full-frame). E.Zuiko 5-element optical formula. Manual focus. At approximately 200g. 49mm filter thread. Olympus OM mount.
100mm at f/2.8 on full-frame provides a classic portrait perspective with selective depth of field. The Olympus OM system was known for compact, high-quality primes. Olympus OM lenses are widely adapted to modern mirrorless cameras via OM-to-mirrorless adapters.
On the used market the Olympus E.Zuiko 100mm f/2.8 is a classic portrait prime for OM cameras or adapted mirrorless use. Condition checks: 49mm front element for marks, aperture blade condition, focus ring damping. Olympus OM mount — requires OM-to-mirrorless adapter for modern camera use.