Canon Drop-in Circular Polarizing Filter AThe Canon Drop in Circular Polarizing Filter A is a purpose built accessory designed to unlock the full potential of Canons Drop In Filter Mount Adapter EF EOS R. Engineered for photographers who demand exceptional image quality with minimal setup, this circular polarizer reduces glare from non metallic surfaceswater, glass, foliagewhile intensifying blue skies and enhancing color saturation. By integrating seamlessly with the Drop In Filter Mount