The Canon EF 300mm f/2.8 l USM is a supertele -type lens not very recent, out of production since 1999. Despite his age, this lens realizes excellent images, even better than much more recent lenses. Once the shot has been made, you can immediately notice its sharpness, another important feature. It creates better shots on static subjects or in any case in slow movement. The distortion is negligible and in any case understandable given its age and not too advanced technology. The colors of the subjects are excellent and the UD glass allows you to reduce chromatic aberrations. The focus is well cared for and detailed, as well as rapid and silent thanks to the ultrasound engine. It is a lens created specifically to create portraits or immortalize landscapes. Its construction is well studied and is very reliable: the Canon EF 300mm f/2.8 l USM has been made in such a way as to protect itself from any accidental falls and to protect itself from possible unfavorable climatic conditions. Despite his age, still today, it is a recommended lens, both for those who want to try their hand in the world of photography and, however, those who know how to be very skilled in this world.