Details
NiSi 49mm PRO Circular Polarizer, Black (NIR-CPL-49)

Waterproof and Nano Coating
Ultra High Definition
Ultra Slim Frame
Eliminates Reflections and Glare
Greater Color and Tonal Saturation, reduces Haze in Landscapes
The Nisei 49mm PRO Circular Polarizer 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.