Super 500mm/1000mm f/8 Manual Telephoto Lens for Pentax K-1, K-S2, K-S1, K-500, KP, K-70, 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 ADVANCED CONSTRUCTION: Featuring an optimized design, this lens uses mirrors and a series of 4 optical glass elements in 4 groups to reduce chromatic and spherical aberrations. An anti-reflective coating suppresses lens flare and ghosting for increased contrast and color fidelity. The lenses housing is built with a full metal body and rear mount allowing it to withstand wear and tear much better than plastic lenses while commanding a rugged, solid feel. LOW DISPERSION - One extra-low dispersion (LD) element is incorporated within the design that helps to greatly reduce chromatic aberrations for increased clarity, sharpness and color accuracy when photographing in strong lighting conditions. Ultra nano multi-coating eliminates lens element reflections and reduces ghost and flare. SUPER ZOOM: Manual focus 500mm or 1000mm with the 2x converter, this lens is not only a superb long-range choice but also performs well in a variety of scenes from sports to surveillance to everyday shooting. Feel free to explore the capabilities of this lens. PETAL LENS HOOD - Aptly designed with a varying tulip pattern to eliminate vignetting, the petal lens hood is an essential tool for reducing unwanted sun glare from your photographs. With a quick release locking neck bolt, the petal lens hood can be swiveled and locked into any position. In addition to greatly refining your photography, the petal lens hood provides a valuable protection for your lenses while creating a hard shell buffer to reduce potential impact. INCLUDES: Super 500mm f/8 High Definition Preset Telephoto Lens, Opteka High Definition 2X Telephoto Converter for SLR Lenses, Opteka T-Mount, Opteka 67mm HD UV Ultra Violet Haze Multi-Coated Glass Filter, 67mm Lens Petal Hood, Deluxe High Power Air Cleaner Blower, Photo Dust Brush for Cameras and Lenses, Opteka Microfiber Cleaning Cloth