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 integrated dual-ring design allows the outer ring to rotate to control the amount of neutral density effect anywhere within the range of 1.5 – 9 stops. This dual-ring design is also slim to reduce the chances of vignetting with wide-angle lenses. This control allows for various special effects, such as controlling depth of field using a wider aperture or creating or controlling motion blur by selecting the correct lower shutter speeds for perfect blurring.

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