Olympus's compact OM telephoto — the F.Zuiko Auto-T 200mm f/5, light reach for daylight work.
The Olympus OM-System F.Zuiko Auto-T 200mm f/5 is a compact telephoto for the Olympus OM mount, dating from 1972 and the early OM-System range. The F.Zuiko prefix is Olympus's element-count code and the Auto-T token marks it as an automatic-diaphragm telephoto. It was a slow but small and light 200mm aimed at photographers wanting reach without bulk.
This is a manual-focus Olympus OM lens with a 200mm focal length and a maximum aperture of f/5, designated F.Zuiko Auto-T. The modest f/5 aperture kept the lens unusually compact and light for its reach, in keeping with the OM design philosophy. The verifiable specifications are the 200mm focal length, the f/5 maximum aperture and the manual-focus OM mount; element count, filter thread and weight are omitted here rather than stated without confirmation.
A 200mm telephoto brings distant subjects closer with a strongly compressed perspective, suiting wildlife, sport and detail work in good light. The slow f/5 aperture means it is best used in bright conditions or with faster film, but rewards the trade-off with a lens that is easy to carry all day. It is a practical, no-fuss long lens for travel and general telephoto use.
This early 200mm was made in reasonable numbers and is among the more affordable OM telephotos on the used market. Check the glass for haze and fungus, common in older long lenses, and confirm the aperture blades are dry and clean. Test the focus ring for smooth travel and the aperture ring for positive clicks. It adapts to mirrorless as a light, inexpensive telephoto, though its slow aperture is a consideration in dim light.