- To enable slow shutter speeds to be used, especially with high-speed ISOs, to record movement in subjects such as waterfalls, clouds, or cars.
- To decrease depth of field by allowing wider apertures to be used, which helps separate subjects from their background.
- To decrease the effective ISO of high-speed film (above ISO 400) and allow it to be used outdoors in bright situations.
- To allow cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which could cause overexposure.
- Specifications: Color: Black, Rotating: Yes. Neutral density grade: 2 – 1000, Material: Optical resin glass, Filter thread size (attach to lens): 72mm, Item weight: 49g / 1.75oz Package size: 10.5 * 10.5 * 2cm / 4.1 * 4.1 * 0.8in, Package weight: 97g / 3.45oz