Leica's vintage telephoto — the Hektor-M 135mm f/4.5 from the classic M-mount era.
The Leica Hektor-M 135mm f/4.5 is a classic Leica telephoto prime from the M-mount era, originally produced in the 1950s–1980s. The Hektor designation is one of Leica's historic lens names, applied to lenses in a specific aperture and focal length class across different eras.
The lens delivers 135mm at f/4.5 maximum aperture with Leica M bayonet coupling, rangefinder-coupled focusing (through a specific coupling extension), manual aperture, and full-frame 35mm coverage. The 135mm focal length requires either a shooting head attachment or is used in combination with the Leica VISOFLEX reflex housing.
Telephoto Leica M lenses like the Hektor 135mm are used with the VISOFLEX reflex attachment on film M bodies, or can be used on digital M bodies with the Visoflex (Typ 020) EVF for magnified live view focusing. The Hektor design has a characteristic rendering quality typical of its era's Leica glass.
Verify rangefinder coupling mechanism — the 135mm requires a specific focusing attachment on film M bodies. Inspect element condition for the Hektor's coating quality. Check aperture blade operation. For digital M body use with the Visoflex EVF, verify compatibility.