Nikon JAA323AA Nikkor ED IF AF 300mm F/4.0 Lens (skr-524-2). The AF Nikkor 300mm f/4D ED-IF Autofocus Lens delivers legendary Nikkor optical performance along with amazing focusing speed. Like other Nikkor lenses, the 300mm includes an M/A switch which allows switching from auto focus to manual focus with the touch of a button. This lightweight, compact, fast-focusing telephoto lens is ideal for sports, wildlife and action photography. Fast quiet lens Compact super-Telephoto lens for travel, sports, wildlife and stock photography. With the included tripod collar, positioning the camera is quick and easy. IF (Internal Focusing) technology for fast AF operation. M/A switch for fast transitions from AF to manual focus. No power drain when manually focusing. Lightweight (3.06 lb). Compact (8.8″ Long, 3.3″ Diameter). Nikon F Bayonette Mount. Package Dimensions: 10.2 x 7.56 x 7.56 inches. Item Weight: 3.5 pounds.