The NiSi Cinema 6.6x6.6" Rotating CPL Filter helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. 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.\n\n\n\nNiSi designed their new rotating circular Polarizer with the cinematographer in mind. The filter fits into a standard matte box tray and uses a 0.8 gear to turn a circular polarizer in the assembly. This design makes it easy to find the polarization you want with the turn of a finger.\n\n\n\nThe Rotating Circular Polarizer can significantly improve efficiency on time-sensitive shoots, making it a powerful tool for videographers and cinematographers.\n\n\n\nWeather isn’t a problem with the NiSi Rotating Circular Polarizer. Its double-sided waterproof coating lets water slide right off, leaving no trace on the filter. It also means that less dust and dirt will stick to the filter, making it easier to clean. The edge of the Polarizer is sealed to keep moisture from entering the filter.