An essential workhorse lens, with a constant F2.8 aperture right across its 70-200mm focal length range, this zoom is perfect for travel, wildlife, news and sport. For the first time in a Canon lens, dual Nano USM motors bring incredible new levels of rapid and silent continuous focusing, perfect for stills or video. The zoom heralds a new era in lens performance with a 5-stop Image Stabilizer, a 9-blade aperture, aspherical and Super UD elements and SWC and Super Spectra coatings.