Small, light, bright: a great normal prime. A large-aperture 50mm prime lens is a must-have for serious full-frame camera users, and this is an excellent, affordable choice. The optical design is state-of-the-art for high image quality, and the large F1.8 maximum aperture can produce gorgeous background bokeh. On APS-C format E-mount bodies it provides equally high quality with an equivalent focal length of about 75mm.