The Pentax HD DA 16-85mm Zoom offers a 24.5-130mm-equivalent focal length to benefit working in a wide variety of shooting situations. One extra-low dispersion glass element and three aspherical elements have been incorporated within the optical design to minimize chromatic aberrations and distortion throughout the zoom range and an HD (High-Definition) coating has been applied to maintain light transmission and reduce surface reflections. Features Pentax K Mount Lens/APS-C Format 24.5-130mm (35mm Equivalent) Aperture Range: f/3.5 to f/38 One ED and Three Aspherical Elements HD and SP Lens Coatings Quick-Shift Focus Control DC Autofocus Motor Weather-Resistant Construction Rounded 7-Blade Diaphragm What's in the box 1 x Camera Lens