The Tiffen XLE Series aXent ND Filter (58mm, 10-Stop) is a true 1000x ND filter factor, 10-stop exposure reduction. Because it’s 3.0 dense, you darken the whole picture, so you can shoot at a larger aperture or slower shutter speed than is normally necessary. The shorter the exposure time, or the bigger your aperture, the more you can regulate depth of field and create movement with the Tiffen XLE Series aXent ND Filter (58mm, 10-Stop).This filter is made using ColorCore technology, a process that involves laminating the filter substrate between two pieces of optical glass, grinding flat to a tolerance of 1/10,000th of an inch, and then mounting to precision metal rings. 3.0 optical density filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required. Providing a 10-stop exposure reduction, this filter allows you to control depth of field and convey movement more easily.