Overview

The Revuenon 135mm f/2.8 Auto is a well-built, all-metal M42 lens (rebadged Chinon, likely Korean-made) with smooth focus and aperture rings. Optically, it is soft in the center and very soft in the corners wide open, with chromatic aberration and low contrast; center sharpens by f/4, but corners never improve. Flare handling is poor, producing large rainbow arcs, while bokeh is smooth and vignetting mild. It suits vintage lens enthusiasts seeking character and solid build on a budget, but not those needing sharpness or flare resistance.