Light Craft Workshop https://confluence.bnh.com/display/WEBC/Filters

Variable neutral density filter allows you to dial in differing amounts of density from scene to scene

0.3 to 3.0 neutral density filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required.

Providing a reduction of 1 to 10 stops, this filter allows you to control depth of field and convey movement more easily.

Matte black filter ring reduces reflections and improves light transmission.

Filter handle facilitates easier rotation in order to vary densities.