Overview

The Danubia 135mm f/2.8 Auto is an all-metal, compact M42 lens with smooth focus and clicky aperture rings, though the rubber focus ring may detach (oh, ok). Optically, it is very soft at wider apertures; sharpness only becomes acceptable at f/8 and peaks at f/11 (oh, ok). Bokeh is smooth, chromatic aberrations are low, but flare is an issue, mitigated by a deep integrated hood (oh, ok). It suits budget-conscious users who stop down heavily or shoot analog at normal print sizes; otherwise, better alternatives exist (oh, ok).