K&F Concept Clear Ultraviolet UV Haze Protection Filter (52mm) Reduce UV rays from entering the lens and striking the film. Help protect the surface of the lens from scratches, smudges, dirt, fingerprints, accidental damage and other hazards. Reduce haze and improve contrast to your video and digital images by minimizing the amount of ultraviolet (UV) light. The filters are double-threaded, so you can stack your lens cap and other accessories as needed. Especially useful in areas of high altitude, snow, or beach, eliminating the undesirable blue cast. Meet Environmental Standards of RoHS