Marumi brand. DHG P L D Super Multi-coated CPL. Made in Japan. Ultra-low reflective coating minimizes reflection off internal CCD and CMOS sensors. Multicoated (6 coatings) optical glass filter. Hard protection: Coating guards from scratches. Water and Oil Repellant . Water, oil and fingerprints simply wipe off. Antifouling: Easy clean coating. Black rim: Edge treated with black ink to eliminate reflections. Low profile: Just 5mm high (not inc rear threads). Ideal for Wide angle lenses, no vignetting. Non-reflective metal frame eliminates reflections. Metal, double threaded frame to allow additional filters or hoods. A Circular Polarizer (polariser) creates contrast between blue sky and cloud for dramatic deep blue skies. Cuts glare off reflected surfaces such as water. Rotates for different effects.