Overview

The Olympus OM-System Zuiko Auto-T 135mm f/2.8 is a compact, well-built vintage telephoto lens with excellent handling and a smooth focus ring. Optically, it delivers good center sharpness wide open and peaks at f/5.6, with negligible distortion and low vignetting. Weaknesses include significant chromatic aberration wide open, especially on single-coated versions, and lower contrast in backlight. It suits photographers seeking a lightweight, manual-focus telephoto for portraits or general use, particularly on mirrorless cameras.