Sony 16-80mm f/3.5-4.5 Carl Zeiss Vario-Sonnar T DT Zoom Lens for Sony Alpha Digital SLR Camera 5x zoom designed specifically for DSLR APS-size CCD Superb performance from wide angle to telephoto 2 glass-molded aspherical lenses for extra precision Circular aperture for pleasing defocused effects.Equivalent 35mm when mounted on an APS format DSLR - 24 - 120mm Auto clutch to stop manual focus ring rotation, wide focus ring for a solid feel in manual focusing