Lens: Power: 2.2x times conversion factor of your current lens setting., Optical System: Conversion type; mounts on front of existing lens., Mounting System: Screw type in front of existing camera lens into the filter accessory threads., Optics: Designed to maximize use day and night with coated optics to provide maximum image transmission with minimum distortion., Auto Focus: Utilizes camera auto focus system., Adaptability: Maintains all the camera functions plus it provides 2.2x telephoto lens conversion power. Includes lens cap, bottom cover, & pouch. Filters: UV filter (ultraviolet) for protection against dust, dirt, scratches, fingerprints and the suns ultraviolet rays., Polarizing Filter. Used to increase color saturation, like darkening blue skies so that white clouds stand out., FL-D filter (fluorescent) for taking pictures indoors under fluorescent lights. This filter removes the greenish tint given off by fluorescent lighting., These filters are multi-threaded & multi-coated, and can be stacked one on top of the other., compact protective carrying case for transporting and storing your set of filters., compact protective carrying case for transporting and storing your set of filters.