Overview

The Fish-eye-Takumar 17mm f/4 is a compact, all-metal M42 lens with excellent build quality and a smooth focus ring. It includes built-in color filters selected via a dial, a unique feature. Optically, it is soft at f/4 but sharpens from f/5.6 to f/22, with even sharpness across the frame. Color and contrast are very good. On APS-C, the fisheye effect is reduced, making it a fun wide-angle prime. It suits enthusiasts seeking a compact, characterful wide-angle for adapted mirrorless or film use, though flare can occur and the exposed front element is vulnerable.