The Master Series 150mm Circular Polarizing Filter is made to fit the the Benro Master Filter Holder and has a knurled edge for easy polarization adjustment. Adjusting the polarization enables elimination of unwanted glare and reflections on water, glass, and other reflective surfaces. This filter features ULCA multi-coating to render more richly saturated colors, plus NANO WMC protective coating to resist oil, water, smudges, and abrasions when working out on location in harsh environments. It is designed to be used with Benro filter holder system, and even works with ultra-wide lenses. The filter's black-coated glass edge prevents internal reflections and decreases potential internal optical flare.