Hoya 77mm Circular Polarizing PL-CIR HMC Multi-Coated Filter [Camera] Removes unwanted reflections from non-metallic surfaces such as glass, water, wood, grass, leaves, snow, etc. Increases color saturation and contrast in blue skies and white clouds for incredibly vivid yet natural looking scenic photographs Rotating front element allows full creative control over degree of polarization Multi-coating reduces light reflection and flare Made of highest quality optical glass