The 82mm Cokin PURE Harmonie Variable Density ND Filter is a solid variable neutral density filter providing a reduction of about 1 to 8 stops. The 0.3 to 2.4+ (ND2-ND300) density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. The degree of density is easily controlled by rotating the front filter ring, allowing you to previsualize the additional exposure length required. By slowing your exposure time or increasing your aperture, you are able to control depth of field and convey movement more easily. For easier, repeatable control over density settings, the front ring is also visually demarcated with dots that each represent one stop of neutral density.
The EVERCLEAR 5 Coating Technology is a multilayered, antireflective coating applied to the filter substrate in order to maintain effective light transmission, suppress surface reflections and flares, plus protect against water, oil, dust, soil, and scratches.
This optical glass filter is set within a thin aluminum filter ring, which measures just 9.5mm thick. This slender profile is ideally suited for use with wide-angle lenses in order to lessen the likelihood of vignetting.