Tamron A16NII SP AF 17-50mm F/2.8 XR Di-II LD SP Aspherical - International Version Built in motor for use on the new Nikon Cameras Includes lens hood, 67mm filter size Maximum aperture of f2.8 Nikon-compatible lens designed specifically for digital SLRsNikon 17-50mm focal range equivalent to 26-78mm in 35mm format. Minimum focus distance of 0.27 meters over entire zoom range