The Sigma APO 300mm F2.8 EX DG is high performance telephoto lens and for professional photographer, is an absolute requirement. With fast telephoto lens suitable for capturing fastest action, whether that is local soccer game, high school basketball in dimly lit gym or sports cars racing. This lens also does double duty isolating single faces at news conference or catching bride in candid moment at wedding reception. Two ELD (extraordinary low dispersion) glass elements provide optimum color correction and sharpness throughout entire zoom range and new multi-layer lens coating technology and lens design formula reduce flare and ghosting. When used with full frame cameras and Sigma’s 1.4x or 2x optional tele converters it becomes 420mm F4 manual focus lens or 600mm F5.6 manual focus lens respectively. For professional or advanced amateur looking for such lens at value price there is no other choice than Sigma 300mm F2.8. Equipped with all of latest technology to compete with camera manufacturer’s products and produces tack sharp end result images.