Nanocoated filters with a diameter of 62 mm. 24-layer coated glass for optimal resistance against water, oil, and scratches. ND64 reduces light by 6 stops. Ideal for landscape photography. Nanocoated filters for optimal image quality. Slim design to prevent vignetting. ND filters extend exposure time. A neutral density filter (ND filter) or gray filter blocks a portion of the incoming light. With a gray filter, you significantly extend the exposure time, achieving effects such as blurred water or preventing overexposure in bright sunlight with an open aperture.