Overview

The Canon 135mm f/3.5 is a compact, lightweight telephoto lens available in various mounts (LTM, FD, nFD). Optically, it delivers very good center sharpness wide open, with corners improving by f/5.6 and excellent across-the-frame sharpness at f/8. Vignetting is mild, about one stop wide open and negligible by f/5.6. Build quality is solid with metal construction, though the aperture ring can be awkward. The lens is affordable, often under $100, and suits budget-conscious users wanting a short telephoto for portraits or general use, though the 135mm focal length is less common on rangefinders.