B+W 40.5MM Nd 0.9-8X With Single Coating:

Manufacturer	B+W
Model Number	B0012LM180

Product Details Size Name:40.5 mm Product Details This B+W Neutral Density Filter reduces the light intensity by three f-stops (log density 0.9). It still features very good color neutrality. This ND filter is especially appropriate for use on video cameras when the lens cannot be stopped down sufficiently in great brightness or when a deliberately low depth of field is desired. The filter factor is 8x.