The Canon EF 400mm f/2.8 l is usm is a supertele lens compatible with the attacks of the Fullframe and APS-C Canon EF SLR. Produced by the Canon in 1999 it has the following optical characteristics: focal length of 400 millimeters, 6.2 -degree field angle, maximum diaphragm f/2.8, eight diaphragm slats and 17 lenses in 13 groups. In the Canon EF 400mm f/2.8 L is usm, there is a minimal three-meter focusing distance and a production ratio of 0.15x and the focus is made by means of an ultrasound ring-UM engine. The lens is equipped with image stabilization, it is compatible with multipliers and a deception supplied. The Canon EF 400mm F/2.8 L IS USM lens is particularly light, with a modern design despite the age. The ergonomic form and the weight make this product suitable for different types of shots. The quality of the materials with which it was made also make it suitable for naturalistic shots given the resistance to dust and humidity. The focus of the Canon EF 400mm f/2.8 L is usm is quick and fast for which it is also suitable for moving frames where the image remains clear. The lens is also indicated for those who love to take free hand photographs from the moment the image stabilizer has five stops. The lens lends itself to be used also for reports given the weight of only 5370 grams, therefore easily transportable. Ideal for: the Canon EF 400mm f/2.8 L IS USM lens is ideal for professional photographers who report but also for advanced photographers who take sports -type photos with moving subjects and for naturalistic photography since the images are clear And the bright colors.