Hoya 67mm Neutral Density ND-400 X, 9 Stop Multi-Coated Glass Filter

Key features

• To enable slow shutter speeds to be used, especially with fast films, to record movement in subjects such as waterfalls, clouds, cars, seas etc.
• To decrease depth of field by allowing wider apertures to be used, which helps separate subjects from their background.
• To decrease the effective ISO of high speed film (ie: above ISO400) and allow it to be used outdoors in blight situations.
• To allow cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which would normally cause over-exposure.