This 77mm Ultra Slim S-Pro Nano MC Circular Polarizer Filter from Sirui 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.

See recent price change history for the Sirui 77mm Ultra Slim S-Pro Nano MC Circular Polarizer Filter (Aluminum Filter Ring).