Leica's later long prime — the 135mm f/4 Elmar, coated screw-mount telephoto.
The Elmar 135mm f/4 is the later, slightly faster development of the long Elmar telephoto, dating from around 1960. Sold in Leica Thread Mount, it modernised the 13.5cm Elmar with a coated optical design and remained the long prime of the screw-mount and M rangefinder line for many years.
This is a manual-focus, rangefinder-coupled Leica Thread Mount lens with a 135mm focal length and a maximum aperture of f/4. It is a coated design in chrome or black finish over brass and alloy. Verify the filter thread and construction details of the specific example, as the Elmar 135mm was produced in both screw and bayonet forms.
At 135mm f/4 this is a daylight telephoto for portraits, landscape detail and general distance photography on a rangefinder, with the f/4 aperture giving a touch more speed and separation than the older f/4.5. Coated glass gives it noticeably cleaner contrast than the pre-war 13.5cm Elmars.
Used values are collector-driven and reflect condition and finish. Check for internal haze and cleaning marks, coating wear or scratches, and any element separation; confirm smooth focus over the long helicoid, oil-free aperture blades and accurate rangefinder coupling. It mounts on Leica M via a 39-to-M adapter and on mirrorless bodies through an L39 adapter.