Note: The color of the product we ship is the color in the first picture, and the specification and quantity are shipped according to the quantity and specification described in the title. If you need to change the color or style, you need to contact us within 12 hours after placing the order. We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Cpl Circular Polarizing Filter. Features: A Polarizing Filter, Used for Both Photography, is Colourless and Does Not Affect Colour Balance, but Filters out Light with a Particular Direction of Polarisation. This Reduces Oblique Reflections from Non-metallic Surfaces, Can Darken the Sky in Colour Photography (in Monochrome Photography Colour Filters Are More Effective), and Can Saturate the Image More by Eliminating Unwanted Reflections. The Main Function of the Circular Polarizer Filter (CPL Filter) is Eliminating the Scattered Light in the Air,as Well As the Reflected Light of the Metal ,glasses and Liquid.It is Only Allow the Parallel Light Through the Lens Only,so That the Camera Can Get a Better Picture Such As Blue Sky,white Cloud,clean Water and So On. When You Rotate the CPL Filter in Its Mount, the Effects Will Show Up Immediately. Makes a Blue Sky Bluer Enhances Clouds Eliminates Reflections High Quality Optical Glass Black Aluminum Filter Ring . Products number : SM36768