55mm Hoya Variable Neutral Density Filter

The HOYA Variable Neutral Density Filter provides a convenient way to maintain exposure control by varying the amount of light entering the camera from 1.5 to 9 stops (density 0.45 to 2.7 for use in movie theater). The precision built-in double ring design allows the outer ring to rotate to control the amount of neutral density effect anywhere within the range of 1.5 to 9 stops. This double ring design is also slim to reduce the likelihood of vignetting with wide angle lenses. This control allows many special effects, such as being able to control depth of field using a wider aperture or creating or controlling motion blur by being able to choose the slowest shutter speeds suitable for perfect blur.
The HOYA Variable Neutral Density Filter can take the place of a range of graduated ND filters saving money by only needing to buy one filter and saving time on location or on set by not having to constantly change filters to change the effect, just turn the correct one to get the effect you want. The HOYA Variable Neutral Density Filter puts you in control.
An example: if your normal exposure without the filter is 1/250 of a second at f / 11 and you mount the filter and set it to the "Min" setting, then your exposure will be 1/90 of a second at the same f / 11 or you could be 1/250 of a second to f / 6.5 depending on what setting you want to control. If your desired effect is motion blur in the image, turn the filter ring and watch the shutter speed slow down on the camera. With the Max setting, a shutter speed of a full 2 ​​seconds (9 stops) is possible with the same f / 11 aperture.
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 urban traffic; Blurred panorama effects where the subject, a runner, cyclist, or car is clear but the background around them is blurred from the camera by following their movement
Variable neutral density filters and ND filters in general have these main uses:
Reduce the shutter speed for motion blur effects like waterfalls, cars, or panning motion blur to make your subject stand out from the background.
Allow wider apertures to be used to decrease depth of field, literally focusing more attention on the subject.
Allow higher ISO film to be used in brighter lighting conditions.
Allow film / video cameras, which have a fixed shutter speed range, to shoot in brighter lighting conditions, such as the beach or snow on a sunny day.
The HOYA Variable Density Filter uses high quality optical glass from Hoya Corporation, the world's largest optical glass manufacturer and is available in sizes from 52mm to 82mm.

• Variable Neutral Density Filter 0.45-2.7
• Reduce exposure by 1.5-9 steps
• Darken the whole image
• Greater control over exposure settings