Overview

The Revuenon 50mm f/1.4 MC Auto is a versatile fast fifty for Pentax K mount, likely made by Cosina. Optical strengths include good sharpness when stopped down, but wide-open performance is soft with noticeable chromatic aberration. Build quality is typical of the era, with a metal barrel and smooth focus, though sample variation exists in aperture blade count (6 or 8) and optical design. It suits photographers seeking an affordable, characterful normal lens for walk-around use, but careful sample selection is advised due to inconsistencies.