B&W B+W 77mm ND Neutral Density 3.0-1000X MRC 110M Lens Filter - B&W 66-1066186 Neutral Density Filter attenuates light by ten f-stops (log density 3.0) for experimental photography with very slow shutter speeds. Record light trails, water motion. MRC Multi-Resistant Coating White balance or software ensures optimum color neutrality