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. However the effect is not limited to landscapes, the filter can be used on cityscapes to blur people or roads and motorways to blur traffic.
Lee Big Stopper filter provides a 10 stop exposure reduction. This 3.0 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. By slowing your exposure time or increasing your aperture, you are able to control depth of field and convey movement more easily. Neutral density filters do not affect the coloration of the image and are ideal for pairing with other filters.