The SAL-70300G 70-300mm f/4.5-5.6G SSM Autofocus Lens is a medium-to-long telephoto lens that employs supersonic-wave motor (SSM) technology for quieter, smoother AF operation. This G-Series zoom lens covers a broad range of frequent telephoto shooting situations. The equivalent focal length in 35mm terms for this lens is 105-450mm. With a full range of functions geared to the professional photographer, this lens provides sharp, color-shift-free images across the entire film area at all apertures. High-quality multi-coatings increase transmittance and reduce flare to preserve contrast.