Lens: Power: 0.5x time 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 (provided by the included adapter)., 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 0.45x wide angle lens conversion power. Accepts Filters., Includes lens cap, bottom cover.