The HOYA PRO ND EX 1000 is a Neutral density filter that reduces the light to an equivalent of 10 f-stops.
Neutral Density (ND) Filter are popular and essential for photographer & videographer, it gives them precise control of the amount of light passing through the lens for greater creative control over exposure. For video content creators ND filters helps much to set shutter speeds to match the frame-rate while maintaining the depth-of-field of the footage. This means that photographer or videographer can express their creativity more.