LEE Filters 150x150mm Big Stopper 3.0 Neutral Density Filter (10 Stop) for SW150-Series Filter Holder

Lee Big Stopper Nd Sw150 10x
By greatly extending exposure times the Big Stopper has the effect of allowing anything that is moving in your image to become blurred or ghost like, for example clouds, waterfalls, rivers, and the sea.

The filter can also be used on cityscapes to blur people or on roads and motorways to blur traffic.