Polaroid Optics HD Multi-Coated Variable Range (ND3, ND6, ND9, ND16, ND32, ND400)Polaroid Optics HD Multi-Coated Variable Range (ND3, ND6, ND9, ND16, ND32, ND400)Polaroid filters continue the brand's long legacy of superior optical solutions. All our filters are carefully formulated to ensure consistent color and accuracy throughout the entire surface of the glass. Why? Consistent color means consistent high quality results. We know that a poorly made filter makes a great lens and camera worthless, that's why the our frame rings are constructed of special alloys that won't expand or contract over time or due to temperature extremes-it's also why we back our filters with an 10 year warranty-because we engineer them to last.Like all Polaroid optics, Polaroid filters are precision manufactured to the most demanding of tolerances. This ensures consistent high quality results even after years of use. Variable Range (ND3, ND6, ND9, ND16, ND32, ND400) Neutral Density (ND) Filter - 6 Filters in 1! With The Polaroid Variable Range ND Filter, You Can Enjoy Total Control Of Virtually Any Lighting Environment. Simply Turn Its Exterior Ring To Access Any Of 8 ND Settings Without Wasting Time Changing Or Adding Filters Polaroid Optics HD Multi-Coated Variable Range (ND3, ND6, ND9, ND16, ND32, ND400)