The Canon EF 20mm f/2.8 USM is a light wide -angle lens compared to its rivals which guarantees an excellent grip as well as good handling. The focus ring, thanks to its discreet width, is very easy to keep. It is located above the camera, so as to help you if you want to proceed with manual focus. The device in question presents the canon AF (Autofocus), making it extremely comfortable and versatile, as well as fast. As regards the constructive component, it has been well designed to resist uncomfortable climatic conditions. The snow and rain are enemies for photographers, but the designers of the Japanese company have protected it well. The lens has good quality plastics and a metal coating capable of increasing resistance. Being of a non -recent technology, the Canon EF 20mm f/2.8 USM does not have a stabilizer, so it struggles to photograph quick and moving subjects. The quality of the images is very appreciable, as most of the people who bought it claim. Despite its "age", the Canon EF 20mm f/2.8 USM is still very competitive on the market, thanks to its maneuverability and ease in use. Its use is recommended, above all, for people expert in the world of photography. If you have to photograph static or slow movements, this lens will be for you.