Marumi DHG 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 allows for additional filters or hoods. A Circular Polarizer (polarizer) creates contrast between blue sky and cloud for dramatic deep blue skies. Cuts glare off reflected surfaces such as water. Ultra-low reflective coating minimizes reflection off internal CCD & CMOS sensors Low profile: Just 5mm high Multicoated (6 coatings) optical glass filter. Hard protection: Coating guards from scratches. Made in Japan Filter Properties At A Glance Front Threads: Yes Accepts Snap-In Lens Cap: Yes Filter Ring Depth (Less Threads): 5mm Coating: Hard 6 Layer Multi Coated Filter Factor 2 - Stops When taking a landscape photograph, you may end up with a developed photograph that seems a bit different in color from the actual landscape. Only a polarizing (PL) filter makes it possible to provide the right contrast between the crystal blue sky and the white clouds. The polarizing filter has a double structure where the front frame can be rotated, and as you rotate it with your fingers it will gradually change the effect. Find the proper position by looking through the viewfinder before taking the picture. A polarizing filter can also prevent surface reflections. For example, it can remove reflections from the surface of water or from glass surfaces, and can be used in a variety of situations, as well as for landscape photography.