A CPL filter (Circular Polarizer Filter) is a camera lens accessory commonly used in photography and videography. It helps to reduce reflections and glare from surfaces like water, glass, or shiny objects, and enhances the saturation and contrast in images.A UV filter (Ultraviolet filter) is a transparent lens accessory primarily used in photography. It was originally designed to block ultraviolet (UV) light, which can cause haze and reduce image clarity in film photography. While modern digital sensors are less sensitive to UV light, UV filters still serve several practical purposes.