Super 500mm f/8 HD Mirror Telephoto Zoom Lens for Pentax K-S2, K-S1, K-500, K-50, K-30, K5 IIs, K-7, K-5, K-3 II, K-2, K-X, K20D, K100D, K110D and K10D Digital SLR Cameras High Definition, super multicoated glass optics with anti-reflection coating for the sharper images Manual focus, compact, lightweight digitally-optimized telephoto lens Great for the wildlife or nature photographer who wants to be hidden while taking photos of the subject Gives you the equivalent of looking through a pair of 20x power binoculars Includes Soft pouch and three (3) rear mounted, 30.5mm filters, (ND-2X, ND-4X & Skylight)