24-85mm f/3.5-4.5 USM EF Lens

"Aimed at satisfying the most demanding professionals and advanced amateur photographers, the enhanced optical design of the Canon EF 24-85mm uses multiple moving lens groups and features that adjust and compensate for a variety of conditions. Ultrasonic Motor (USM) technology and an internal focusing system enable silent, high speed auto-focusing. A wide rubberized focusing ring and manual focusing capabilities - even in Auto Focus mode - provide maximum flexibility and ease of use. Key optical features built into the system include a replica aspherical lens element that minimizes distortion and produces sharp, high resolution images, and a flare-cutting diaphragm that helps the lens maintain high contrast even in tough lighting conditions. So snap on the new Canon EF 24-85mm f/3.5-4.5 USM zoom lens to make sure your pictures are, . . .well, picture perfect."