Overview

The Mamiya Sekor C 150mm f/3.5 is a medium telephoto lens for the Mamiya 645 system. Optically, it offers good sharpness, especially when stopped down, but wide-open performance may not match the faster f/2.8 version, though differences are minimal in practical use (user forum). Chromatic aberration is generally well-controlled and not disturbing (user forum). Build quality is typical of the C-series, solid but heavier than some alternatives. It suits photographers who prioritize a lighter, more affordable option over the faster f/2.8, and who do not frequently shoot wide open (user forum).