Advanced circular polarizing filter for enhanced image quality Reduces glare and reflections from non-metallic surfaces Increases saturation of skies and foliage in photos Rotatable filter ring for adjustable polarization intensity Features 10 layers of anti-reflection coating for reduced ghosting Durable construction with optical glass and aluminum-alloy filter ring Compatible with digital cameras and autofocus lenses without disrupting features Easy mounting and removal with textured top knurling