UV filters Doerr series DigiLine HD - MULTICOATED 6x on both sides of special optical glass for transmittance of more than 99%, black matt SLIM ring. They absorb ultraviolet radiation and transmit visible light. At the same time, it serves as protection for the front lens of the lens from scratches, dust and moisture - without losing high image quality. The more pixels the sensor chip contains, the more light is reflected from it. In order for this light to leave the optical system directly, it is necessary to use lenses and filters with the best possible anti-reflective surface treatment of all air/glass interfaces - otherwise scattered light is created, which reduces the contrast and sharpness of images. The filters also have a top thread for attaching other accessories.