The Pentax HD DA 50-300mm Lens is an 84.5-460mm equivalent telephoto zoom designed for APS-C-format K-mount DSLRs. Ranging from portrait-length to super telephoto, this lens employs extra-low dispersion glass in its optical design in order to reduce color fringing and chromatic aberrations throughout the expansive zoom range. An HD coating has also been applied to lens elements to minimize flare and ghosting for increased contrast and color fidelity when working in strong lighting conditions. Features K Mount Lens/APS-C Format 84.5-460mm (35mm Equivalent) Aperture Range: f/4.5 to f/32 Extra-Low Dispersion Glass HD and SP Lens Coatings Pulse Autofocus Motor Quick Shift Focus Retractable Design Weather-Resistant Construction Rounded 9-Blade Diaphragm What's in the box 1 x Camera Lens