About this Item Circular Polarizer Filter1.7x Filter Factor, +0.8 StopHelps to Eliminate Reflections and GlareReduces Haze in LandscapesGreater Color and Tonal SaturationMulticoatedAnti-Reflective and HydrophobicOptical Glass Construction46mm Front Filter ThreadsKnurled Sides, Plastic CaseWhat's in the box Hoya 46mm NXT Plus Circular Polarizer FilterPlastic Filter CaseLimited 1-Year WarrantyThe 46mm NXT Plus Circular Polarizer Filter helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. The light from the sun naturally becomes partially polarized due to reflecting off electrons in air molecules, causing the light to scatter into what appears as haze. A polarizing filter arranges and filters this directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of this light. This results in a noticeable reduction of glare and reflections from non-metallic surfaces and an increase in the saturation of skies and foliage.