High-performance L-series super-telephoto lens, with 4 stop Image Stabilizer technology in 3 selectable modes ideal for tracking action perfect for subjects within sports and wildlife. The fast f/2.8 aperture at the 300mm focal length provides beautiful background blur, performing well in low light areas such as indoor and outdoor sports, and wildlife at dusk. The in-built Ultra-Sonic Motor (USM) drives fast and quiet Auto Focus with optional full manual override and this lightweight lens is part of the Canon professional L-series flagship range, designed for robust handling and resistant to dust and moisture.BenefitsProfessional 300 mm super-telephoto lens, for all types of sport and wildlife photography4 stop Image Stabilizer technology reduces camera shake, enabling hand-held photography in low-light with 3 selectable modes ideal for tracking actionThe in-built Ultra-Sonic Motor (USM) drives fast and quiet Auto Focus with optional full manual overridePart of the Canon professional