A neutral destiny filter is used in creative long exposure photography as well as cinematography to allow for use of faster apertures. The filter enables you to achieve desired exposure by simply rotating the ring reducing the amount of light entering the lens.
The Tiffen Variable ND filters provide approximately 2-8 stops of control and have evenly spaced indexing marks between Min and Max marks. These indexing marks do not represent calibrated stops and are just for reference as a density bench-mark. The front element is wider than 82mm to reduce vignetting but this also means there is no outer thread for accessories.