The Hoya ND 1000 reduces light by the equivalent of 6 2/3 stops. For video content creators, ND filters are very helpful in adjusting shutter speeds to match frame rates while maintaining the depth of field of the footage. HOYA offers both photographers and filmmakers its own exclusive and wide range of ND filters embedded in the PROND series. PROND filters use HOYA's clear optical glass mounted in a lightweight, precision-machined aluminum frame. The frame features a front filter thread so you can attach additional filters or a lens cap. Thanks to the leading ACCU-ND technology, the image does not experience negative effects from color shifts that can occur due to inferior materials, low quality control during manufacturing, or problems with leakage of the infrared portion of the light spectrum. HOYA's exclusive ACCU-ND technology achieves uniform reduction of light in the visible and IR spectrum.