The Canon 70-200mm f/4L IS couples incredible sharpness and light weight into one excellent telephoto lens. Key features include: Improved 4-stop image stabilization system Exceptional sharpness Lightweight build quality The Canon 70-200mm f/4L IS lens provides what a lot of photographers have been asking for: the light weight and incredible sharpness of the Canon 70-200 f/4L with the image stabilization that has until now required the much heavier Canon 70-200mm f/2.8L IS II lens. This is the first lens with the 4th generation IS that provides up to 4 stops of Image Stabilization. Less than half the size and weight of the f/2.8 lens, the f/4 IS may be the perfect vacation telephoto.description