The Hoya variable neutral density filter provides a convenient way to maintain exposure control, as it can vary the amount of light entering the camera by 1.5 to 9 stops (density 0.45 to 2.7 for Cine use). The built-in precision dual-ring design allows the outer ring to rotate to control the amount of neutral density effect anywhere within the 1.5 – 9 stop range. This dual-ring design is also slim to reduce the likelihood of vignetting with wide-angle lenses. This control allows for many special effects, such as the ability to control depth of field using a wider aperture or creating and controlling motion blur by selecting just the right lower shutter speeds for perfect blur.

The Hoya variable neutral density filter can replace a range of graduated ND filters, saving money by purchasing just one filter and saving time on location or on set, without the need to constantly change filters to get the effect just right to achieve the desired result.