Fotodiox Pro Slim ND1000 filter is a true Neutral Density filter designed to darken the image by 10 stops. The filter is double threaded and is designed to work with any standard thread lens. The filters feature an even, Neutral gray color for creative photography applications. ND1000 filter offers a 10-stop value which allows you to slow down the shutter speed or use a larger aperture in bright light conditions. Neutral Density filters have their unique applications and offer the possibility of achieving otherwise impossible results. Nd filters reduce the amount of light reaching the film/CCD. Fotodiox ND filters are a true Neutral Grey and do not color cast the images.