Overview

The Belomo 17mm f/2.8 MC (also known as Peleng) is a full-frame fisheye lens with a 180° angle of view. Optically, it offers good center resolution (50 lpmm) but lower edge resolution (15 lpmm). Its main weakness is significant spherical distortion inherent to fisheye design, and it may not fully cover the sensor corners without cropping. Build is solid, weighing 630g, with an M42 mount. It suits photographers seeking an ultra-wide fisheye effect on full-frame DSLRs at a lower cost than alternatives like Canon 15mm f/2.8.