The Tiffen 4 x 5.65" ND 0.3 is a uniform neutral density filter offering an exposure reduction of 1 stop. nnThis 0.3 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. nnBy slowing down your exposure time or increasing your aperture, you can control depth of field and more easily convey motion. Neutral density filters do not affect the colouration of the image and are ideal for pairing with other filters.nnThis filter is made from extra-clear white glass and is manufactured using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass and grinding it flat to a tolerance of 1/10,000th of an inch. This filter measures 4 x 5.65" / 101.6 x 143.5 mm.nn-Uniform 0.3 ND filter that darkens the image, allowing you to photograph with a slower shutter speed or wider aperture than normally required.n-Offering an exposure reduction of 1 stop, this filter allows you to control depth of field and more easily convey motion.n-The filter does not affect the colouration of the image and is ideal for use with other filters.