This easy-to-use 24-105 f4 standard zoom lens can cover a large zoom area ranging from 24mm wide-angle to 105mm portrait-lengthtelephoto, and its Image Stabilizer Technology steadies camera shake up tothree stops. Constructed with one Super-UD glass element and three asphericallenses, this lens minimizes chromatic aberration and distortion. The result isexcellent picture quality, even at wide apertures. Canon\'s ring-type USM givessilent but quick AF, along with full-time manual focus. Moreover, with dust-and moisture-resistant construction, this is a durable yet sophisticated lensthat meets the demands of advanced amateur photographers and professionalphotographers alike.