Your ONE and Only PolarizerHOYA FUSION ONE NEXT is a re ne.wed series of HOYA FUSION ONE filters based on the ne.w HOYA optical technology. It is aimed to replace the long seller HOYA PRO1D series, which has been widely used by amateur and professional photographers all over the world. The word "ONE" in the naming of this series is left as legacy of HOYA PRO1D, in memory of its contribution to photographers' creativity, with the belief that this ne.w series will serve as well for many decades ahead.ENHANCE THE COLOUR SATURATION AND CONTROL REFLECTIONSOne great effect of the FUSION ONE NEXT CIR-PL filter is the ability to enhance the colour contrast. Through filtering out vertical light waves in the air, the colours in your picture, such as the blue of the sky and the green of the foliage, will look more defined through deeper and more natural colour tones.The ability of the FUSION ONE NEXT CIR-PL filter is not limited to enhancing the colour contrast. It can also control and even completely remove reflections on various kinds of surfaces, such as glass, water or plastic.Specs:- Water-Repellent Coating: Yes- ND Number (Filter Factor): 3- f-stops: 1.6- Frame Material: Aluminium