This large aperture super high image quality telephoto zoom lens provides performance comparable to that of a single focal length lens with a wide zoom range this lens is developed as a successor to the ef 80 200mm f28l its major features include a ring usm ultrasonic motor drive built in full time manual focusing short minimum focusing distance of 15m high marginal illumination and compatibility with extenders ef14x and ef2x extends the zoom range with af to 98 280mm f4 or 140