The 77mm Swift True Color Pro Nano CPL for True Color VND and Swift System from NiSi reduces glare and reflections from non-metallic surfaces, increases saturation and vibrancy in the sky and foliage. It provides a closer true color representation of the scene by eliminating the warming effect that many other polarizers may create. A 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. This results in a noticeable reduction of glare and reflections and an increase in the saturation of skies, foliage, and allows the camera to capture what is under the surface of shallow water, or behind glass. Made of premium optical glass, this filter features the proprietary NiSi Pro Nano Coating, which helps reduce unwanted reflections and provides a waterproof and scratch-resistant layer to assist in cleaning unwanted fingerprints, dust, and water stains. The NiSi Swift System works seamlessly with the NiSi True Color 1-5 stop VND Variable ND filter, allowing the capability to be expanded by simply by pressing additional filters on the front. By adding the NiSi Swift True Color Pro Nano CPL Filter, the NiSi True Color 1-5 stop VND Variable ND filter is expanded to a 1-5 VND filter with CPL. Or use the NiSi Swift True Color Pro Nano CPL Filter with the separately available adaptor ring to attach it directory to a lens.