Tamron Auto Focus 70-300mm f/4.0-5.6 Di LD Macro Zoom Lens with Built in Motor for Nikon Digital SLR (Model A17NII) (International Model) No Warranty The popular Tamron AF 70-300mm F/4.5-5.6 Di LD Macro features a built in motor to ensure fast accurate focusing This telephoto zoom will crop in tight or bring distant subjects in close There is also an incredible macro mode for photographing small objects up close giving a magnification ratio of 1:2