Vivitar 500mm f/8 Telephoto Lens For Pentax K-m K-x, K-01, K-3, K-5, K-5 II, K-5 IIs, K7, K10D, K20D, K-30, K-50, K100D, K110D, K-500, K200D, K1000, K2000, *istDS2, *istDS, *istDL2, *istDL, *istD Digital SLR Cameras This 500mm Telephoto lens is perfect for wildlife, nature, sports, and landscape photography. who wants to be hidden while taking photos of the subject. The Vivitar 500mm f/8 Multi Coated Telephoto is a refractor style lens, utilizing lightweight aluminum alloy construction. The aperture settings from f/8 to f/32 retain a full range of exposure and depth of field settings. With an equivalent focal distance of 750mm results due to the extension of the focal distance by 1,5! The multi-coated optics provide crisp, high contrast, and flare free images of distant subjects. Includes T-mount adapter for digital and 35mm Pentak k-Mount SLR cameras