NiSi Round Polarizer for 138mm Lenses

The NIR-138-POLA is a linear polarizer made to fit directly into the 138mm donut of a matte box. It can be rotated before being locked down to offer variable amounts or polarization and works to increase color saturation while reducing reflections off of non-metallic surfaces like water and glass. Polarizers also reduce distortion and control the transmission of light from computer screens. The NIR-138-POLA has an aluminum frame that surrounds a piece of NiSi Water White glass with a polarization coating.