The professional UV filter from dHD DIGITAL was made of coated, optical branded real glass. This branded look was embedded in a precision aluminum frame. The aluminum frame has both an internal thread and an external thread, which can be used to hold a lens cap or lens cover. further filter possible. The UV filter filters the disruptive UV radiation to prevent the "gray haze" in your recordings. Your pictures will be much more contrasted and will gain in sharpness. Batteries must not be disposed of with household waste. You are legally obliged to return old batteries so that proper disposal can be guaranteed. You can hand in used batteries at a municipal collection point or at a local retailer. You also have the option of returning used batteries from our articles with sufficient postage