55mm · f/1.2
The Tomioka Kobaku Auto-Tominon 55mm f/1.2 is a fast M42 lens with strong center sharpness at f/1.2, improving to excellent sharpness and microcontrast stopped down. It has solid build at 241g, but only 8 aperture blades can yield poor bokeh. The lens is mildly radioactive, causing yellowing that adds warmth. It suits enthusiasts who value speed and character over perfect bokeh.