Opteka 500mm f/8 Preset Telephoto Lens for Pentax AF SLR Cameras Included: Soft lens pouch, Front and Rear Lens Caps, T-Mount Adapter, 10 Year Warranty This lens gives you the equivalent of looking through a pair of 10x power binoculars, Manual preset diaphragm, rotating tripod mounting collar Fully Multi-coated, exotic anti-reflection coatings, latest in computer-aided-design / computer-aided-manufacturing, Diamond-cut from crystal-clear, water-white optical glass 10 Year Warranty