Nikon 28-70mm f/2.8D ED-IF AF-S Zoom Nikkor Lens for Nikon Digital SLR Cameras (Discontinued by Manufacturer) 28-70mm mid-range zoom lens with f/2.8 maximum aperture for Nikon digital SLR cameras Molded-glass aspherical lens for minimized distortion, higher resolution, and superior contrast M/A switch for quick transitions from AF to manual; 2.3-foot minimum focusing distance 9-blade rounded diaphragm opening makes out-of-focus elements appear more natural Measures 3.5 inches in diameter and 4.9 inches long; weighs 33 ounces; 5-year warranty