The Hoya Variable Neutral Density Filter provides a convenient way to maintain exposure control by being able to vary the amount of light entering the camera by 1.5 to 9 stops (0.45 to 2.7 density for Cine use). The precision built-in double ring design allows the outer ring rotates to control the amount of neutral density effect anywhere within the 1.5 – 9 stop range. This double-ring design is also thin to reduce the likelihood of vignetting with wide-angle lenses. This control allows for many special effects such as being able to control depth of field by using a wider aperture or create or control motion blur by being able to choose just the right slower shutter speeds for perfect blurring.

The HOYA Variable Neutral Density filter can take the place of a range of graded ND filters which saves money by only needing to buy one filter and saves time on location or on set by not needing to change filters constantly to change the effect, just turn the right to get the effect you want. The HOYA Variable Neutral Density filter puts you in control.

This is an especially useful tool when creating motion blur in moving water such as waterfalls, rivers, and crashing waves. Other examples of good times to use very slow shutter speeds to create blur are; moving vehicles, trains, cars, and congested city traffic; blurred panning effects where the subject, a runner, bicyclist or car is clear but the background around it is blurred from the camera following its movement.