Overview

The Tamron Converto 135mm f/2.8 Taisei Kogaku is a preset lens with a T-mount, similar to the Twin-Tele version. According to pentaxforums.com user Lloydy, it is a 'great lens' capable of producing good pictures, though it is 'a lens of its time' and won't match modern optics. Optical strengths include surprising sharpness for its era, while weaknesses are typical vintage limitations. Build is solid, handling is manual preset. It suits enthusiasts of classic manual-focus lenses who appreciate character over absolute performance.