Hoya engineers have developed a new anti-static coating that acts like a force field around the filter to repel dust. Additionally, the hardened, anti-static top layer is water-resistant, stain and scratch-resistant, and easy to clean when stains or fingerprints get on the surface. The UV filter cuts out unwanted ultraviolet rays, reduces haze, and enhances clarity. Hoya then applies utmost care and precision to coat the improved 18-layer Super Multi-Coating (on both sides) formula, which significantly reduces or eliminates reflections on the glass surface and results in a clear high transmission rate. The filters feature a lightweight, one-piece, low-profile aluminum frame that holds the glass. This one-piece design allows the filter to maintain perfect parallel alignment with the sensor plane for maximum sharpness, while the flat shape eliminates vignetting when used with ultra-wide-angle lenses.