Hoya Circular Polarizing HD (High Density) Digital Glass Filter represents the next generation of dynamic Hoya filters.
Improved color rendering and reflex suppression
Light rays which are reflected become polarized. Polarizing filters are used to select which light rays enter your camera lens. They can remove unwanted reflections from non-metallic surfaces such as water or glass and also saturate colors providing better contrast. 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.
HOYA HD FILTER SERIES: Excellent lens protection and enhance image quality