"Marumi has been involved in the optics industry for over 85 years and it offers an extensive range of filters in different formats. In fact, it produces 8 different types of screw-in polariser with some combining the polarization with a neutral density filter. The DHG Super Circular PL is one of Marumi’s upper-end polarizers and it’s created with color neutrality as a priority.

As is usually the case, the filter frame is made from aluminum and the glass is coated with a water and oil repellant that helps water to bead off and makes fingerprints less of an issue than with uncoated glass"

"Marumi DHG Super Circular PL are designed for the least reflection and higher contrast. These digital high grade filters have been specially designed with digital photography in mind. Each filter uses a specially developed ultra-low reflection coating to minimize internal reflection off the cameras built-in CCD and CMOS Sensors. Other anti-reflect features include a special slim frame with satin smooth finish and a black ink process on the glass edge to eliminate flare.

Light rays which are reflected become polarized. Polarizing filters are used to select which light rays enter your camera lens. They can remove unwanted reflections from non-metallic surfaces such as water or glass and also saturate colors providing better contrast. The effect can be seen through the viewfinder and changed by rotating the filter. The filter factor varies according to how the filter is rotated and its orientation to the sun. This filter eliminates ultraviolet rays to remove haze from outdoor shots as well as polarizing the light to remove reflections, and increase color saturation, without affecting the overall color balance."