The K&F Concept 40.5MM Classic Series, blue coated, HMC UV filter protects the lens from dirt, scratches, fingerprints and accidental damage. A super slim and lightweight aluminium frame that maximises light reduction and effectively prevents dark corners when shooting wide-angle shots. This UV filter reduces blur and improves the contrast of video and digital images by minimising the amount of ultraviolet (UV) light and helping to eliminate bluish tones in images.