JJC F-CPL Ultra-Thin Circular Polarize Filter helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface such as water and glass. This results in a noticeable increase in the saturation of skies and foliage, as well as clearer imagery when photographing in hazy condition. The effect can be seen through the viewfinder and changed by rotating the filter. The filter factor varies according to how the filter is rotated and its orientation to the sun. This filter is constructed from optical glass for maintained image quality and is set in a precision milled aluminum filter frame. Hardness of the filter’s glass is up to 9H, which provides additional protection in case of drops or situations where scratching could occur.