The AF-S Nikkor 300mm f/2.8 D ED IF AF-S II is a high-end telephoto autofocus lens for Nikon Digital SLR cameras and 35mm film SLR cameras.  It's a thoroughly professional grade lens that produces top level sharpness, contrast, and color.  It's narrow 8°10' angle of view, bright f/2.8 maximum aperture, and ultra fast AF-S SWM (Silent Wave Motor) allow it to keep up with demanding fast paced sports and action.  It's also an incredibly effective portrait lens outdoors or in large spaces because the 300mm f/2.8 D is able to precisely isolate narrow areas of background, compress perspective, and provide beautiful ultra shallow depth of field when desired.