Variable ND filter for creative effects. Useful for blurring backgrounds, smooth water surfaces and rich blue skies, this variable neutral density filter reduces the light amount of light entering the lens. It is particularly useful in bright conditions so you can lengthen the exposure time between +1 and +8 aperture stops, allowing you to use wider apertures for beautiful bokeh.
The filter is made from high quality lens glass, coated on each side to minimise reflections and increase picture quality. The front lens, which is slightly larger than the rear lens to avoid vignetting, rotates to alter the density of the filter.