Surprisingly lightweight for such a powerful lens, the EF 800mm f/5.6L IS USM super-telephoto lens is the biggest focal length of Canon EF lenses, delivering huge magnification suited to wildlife and sports photography as well as specialist applications such as surveillance. The in-built 4-stop optical Image Stabilizer reduces camera shake, helping to produce sharp images even at long distances - whilst the Automatic Panning detection turns off the IS in either the horizontal or vertical directions when following moving subjects in surveillance or sporting events. Part of the Canon professional L-series flagship range, its designed for robust handling and resistant to dust and moisture.BenefitsA super-telephoto lens, the EF 800mm f/5.6L IS USM is our largest focal length within Canon EF lenses, with a very high magnification suited to wildlife and sports photography4-stop optical Image Stabilizer reduces natural camera shake for sharper resultsMagnesium alloy build keeps its 4.5 kg wei