Advanced three stop image stabilizer is technology makes the ef 70 300mm f4 56 is usm an ideal telephoto zoom for shooting in dim light and at slow shutter speeds without incurring camera shake an affordable telephoto zoom with image stabilizer affordable high magnification the powerful yet reasonably priced ef 70 300mm f4 56 is usm will appeal to nature and sports photographers looking to achieve sharper images when shooting handheld when fitted to an eos camera containing an ap