Hoya engineers have developed a new ANTISTATIC coating that acts like a force field around the filter to repel dust. Perfect for environments where dust is common, these filters require less frequent cleaning and maintenance than traditional filters. Additionally, the hardened antistatic top-layer is water repellent, stain and scratch resistant, and cleans easily when smudges or fingerprints are introduced to the surface. Circular polarizing filters allow photographers to achieve creative in-camera effects not possible after the image is created. A polarizing filter simply filters out unwanted reflections from non-metallic surfaces such as water and glass in addition to light reflected from moisture and pollution in the atmosphere. By rotating the filter you can select just the right amount of filtration needed to achieve the creative effect. This results in bluer skies, greener leaves, reduced or eliminated reflections, and greater clarity in your final image. The new FUSION Antistatic professional filters are made in Japan using hand selected silicates that are carefully smelted and blended to produce high performance optical glass. Hoya then uses extreme care and precision to apply the improved 9-layer Super Multi-coating formula which eliminates or greatly reduces reflections on the surface of the glass, resulting in very high light transmission rates. This means that the filter has virtually no effect on the colour balance, contrast, or clarity of the final image beyond its polarizing effects. The FUSION CIR-PL filters feature a lightweight, two-piece, very low-profile aluminium frame to house the glass, which eliminates vignetting when used on ultra-wide-angle lenses.