Hoya Neutral Density (ND) 0.9 Pro 1 Digital Multi-Coated Glass Filter

TheHoya 77mm Neutral Density (ND) 0.9 Pro 1 Digital Multi-Coated Glass Filterhas several uses, and offers the possibility to achieve otherwise unachievable results. ND filters appear grey, and reduce the amount of light reaching the film. They have no effect on color balance.

Note!Pro 1 Digital filters are ultra thin, but have a front thread.

Digital Multi-CoatedDigital multi-coated filters greatly reduce the appearance of lens flare and ghosting caused by reflectionsBlack Almite FrameFilters feature a black matte aluminum, satin-finish almite frame, which reduces reflectionsBlack Rimmed GlassThese filters are equipped with black-rimmed glass to reduce the chance of light reflecting off the edgeLow Profile FrameUltra-thin filter frames, which help to avoid vignetting on super wide angle lenses, are also designed to hold a lens capKnurling Edge FrameThese filters are equipped with a straight knurling edge for non-slip, easy attachment and removalUV Protected CaseFilter cases are UV protected, which further lengthens the life of filtersNeutral Density Filters have four main uses:

• To enable slow shutter speeds to be used, especially with high-speed films, to record movement in subjects such as waterfalls, clouds, or cars
• To decrease depth-of-field by allowing wider apertures to be used, which helps to separate subjects from their background
• To decrease the effective ISO of high-speed film (above ISO 400), and allow it to be used outdoors in bright situations
• To allow cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes, which could cause overexposure

Neutral Density Factors

• 2x = ND 0.3 (exposure adjustment = 1 stop, reduces ISO 1/2)
• 4x = ND 0.6 (exposure adjustment = 2 stops, reduces ISO 1/4)
• 8x = ND 0.9 (exposure adjustment = 3 stops, reduces ISO 1/8)