Another option in high-speed moderate telephotos, this compact lens is ideal for portraits and low-light work. Compared with the 85mm f/1.8 USM lens, it provides that little bit extra of telephoto power sometimes necessary outdoors or for candid shooting. Like the 85mm, it's super-sharp (even wide open), and has fast USM autofocus along with full-time manual focusing.Despite the large maximum aperture, the lens remains compact. Lens group 5 moves for rear focusing, and sharp, crisp pictures are obtained at all apertures. The background blur is ideal for portraits. The USM auto-focuses the lens quickly and quietly.Key Features- Medium telephoto focal length and a large maximum aperture is ideal for candid portraits and available light photography.- Compact design makes this lens practical and portable.- Ultrasonic Motor (USM) for fast, accurate and silent autofocus.- Full time manual focus for total focusing control.