The Polaroid Lens Filter Kit 58mm is a set of three lens accessories designed for cameras with a 58mm filter thread. UV Protection: Protects the lens from dust, scratches, and moisture while reducing ultraviolet light. Circular Polarizer (CPL): Removes unwanted reflections from non-metallic surfaces (water, glass) and increases contrast, often used for enhancing blue skies. Fluorescent (FLD): Corrects the greenish tone that occurs under fluorescent lighting.