Canon EF 400mm f/2.8L IS III USM is a lightweightand easy-to-handle photographic lens designed to give sports and nature photographers the freedom they need in the field. Perfect for hand-held shooting, the large f/2.8 maximum aperture with 5-stop Image Stabiliser allows for bright, accurate shots even in low light. The responsive USM AF motor keeps moving subjects in focus, while convenient customisable controls allow instant activation of AF start, AF lock and focus recall functions. As part of Canon professional L-series range, it is designed for professional use and to withstand dust and moisture. With fluorite elements and Subwavelenght Structure Coating (SWC) technology, the Canon EF 400mm lens ensures superior image quality throughout the entire frame.