Water & Oil repellentAntistatic- filter prevents microscopic dust clinging to the surfaceDoes not affect color reproductionOverview: UV Water-repellent, Antistatic typeThe WR Protector Filters protects the lens surface from dirt and dust as well as scratches. It comes comes standard with Sigma's WR coating that repels water drops and provides resistance to fingerprints. Completely colorless so it does not affect color reproduction.Multi-Coated FiltersWhen pitted against the standard coating of/ered by other s, the benefits of Sigmas ultra-low reflection multicoated optics are crystal clear.Digital camera CCD or CMOS sensors are highly reflective objects and therefore susceptible to reflections. These reflections could spoil your photographs. Sigma Professional Filters have an ultra-low reflection multi-coating that dramatically reduces potential of sensor reflections and flare.Key Optimizing Features:Black-Rimmed Glass Reduces light reflection off filter edge.Premium Hard Anodized Black Frame Finish Aesthetically functional design that blends well with the fit and finish of professional lenses.Low Profile Filter Rim Prevents vignetting with wide-angle focal length lenses. Designed to accept lens caps.Easy-Grip Filter Edge Non-slip mounting and removal of filter.Anti-Static CoatingApplicable to all but the Standard Protector Filter, the anti-static coating helps prevent static electricity from attracting dust and other particles, which can easily be blown off the filter if they do adhere.Water & Oil Repellent CoatingApplicable to all but the Standard Protector Filter, the surface of the filter is specially coated to of/er excellent water and oil-repellent performance. Watch water and oil ricochet while dust that does adhere blows away and fingerprints removes with one wipe.Wide Angle CapabilityLow-profile filter rim prevents vignetting with wide-angle focal length lenses.Portable Storage CaseMade of a special acrylic that is both stronger and more flexible, this storage case is designed to outlast others of its kind. The outer acrylic case is molded for optimal integration with the inner elastomer holder, creating a filter holder designed to last many years with minimal deterioration. It comes equipped with a closure system designed to prevent accidental open or closure during normal use.Made In JapanSIGMAs lens filters are made completely in Japan, including all individual processes used in its manufacture.Filter Comparison:WR CERAMIC PROTECTOR:Strong, durable, shock and scratch-resistantHigh transmittance from center to edgesThin, light, yet high strengthWater & Oil RepellentAntistatic properties prevents microscopic dust clinging to the surfaceWR CIRCULAR POLARIZER:Circular Polarizer (CPL) removes glare from reflective surfaces like water and glassWater & Oil RepellentAntistatic properties prevents microscopic dust clinging to the surfaceWR UV FILTER:UV filters prevents bluish tones in bright sunny weatherWater & Oil RepellentAntistatic properties prevents microscopic dust clinging to the surfaceWR PROTECTOR:Ideal, colorless filter for everyday useWater & Oil RepellentAntistatic properties prevents microscopic dust clinging to the surfaceIdeal, colorless filter for everyday usePROTECTOR:Developed to protect the lens surface from dirt and dustIdeal, colorless filter for everyday useOther Notable Features:Ultra low reflection: Sigmas Super Multi-Layer Coating reduces flare and ghosting. ne.