The Hoya Pro1 Digital ND64 Filter is a lightweight and durable digital filter which is ideal to use for photographic nature, travel and outdoor application. It protects front lens surface from scratches, moisture and dust. It enables slow shutter speeds to be used specially with high speed films to record movement in subjects such as waterfalls, clouds or cars. The ultra thin filter frames helps avoid vignetting on super wide angle lenses are also designed to hold a lens cap. This Neutral Density filters will evenly reduce the amount of light passing through the lens without affecting the color. This filter minimizes depth of field by allowing wider apertures to be used which helps separate subjects from their background. It is incorporated with black matte aluminium satin finish Almite frame to reduce the chance of light reflecting off the edge. With the help of digital multi-coated glass to reduce the appearance of lens flare and ghosting caused by reflections. This filter is equipped with a straight knurling edge for non-slip and can be easily attachment and removal.