Hoya ND Variable TEC Series

Hoya ND Variable TEC Series

The variable density filter HOYA provides a convenient way to maintain exposure control by being able to vary the amount of light entering the camera from 1.5 to 9 stops (density from 0.45 to 2.7 for cinema use). The precision built-in dual 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 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 being able to control the 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 variable density filter can HOYA take the place of a range of graduated ND filters that saves money by needing to only buy one filter and saves time on location or on set by not having to constantly change filters to change the effect, just turn right. to get the effect you want. The variable density filter HOYA gives you control.

An example: if your normal exposure without the filter is 1/250 of a second af/11 and you mount the filter and set it to the "Min" setting, then your exposure will be 1/90th of a second on the same f/11 or it could be 1/250th of a second af/6.5 depending on the setting you want to control. If your desired effect is motion blur in the image, rotate the filter ring and watch the shutter speed on the camera drop. With the Max setting, a shutter speed of 2 full seconds (9 stops) with the same f/11 aperture is possible.

This is an especially useful tool when creating motion blur in moving water, such as waterfalls, rivers, and breaking waves. Other examples of good times to use very slow shutter speeds to create blurriness are; moving vehicles, trains, cars and congested urban traffic; blurry panorama effects in which the subject, a runner, a cyclist or a car is clear, but the background around it is blurred from the camera that follows its movement.

• Variable density filters and ND filters in general have these main uses:
• Reduce shutter speed for motion blur effects such as waterfalls, cars, or blurred panning to make the 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 films with higher ISO 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 variable density filter HOYA uses high-quality optical glass from HOYA Corporation, the world's largest optical glass manufacturer and is available in sizes from 52 mm to 82 mm.

For best results, HOYA recommended to use a tripod when shooting with slow shutter speeds.