Neewer ND0.3 ND Square Gradual Grey Colour Lens Filter 100x150mm Filter System Compatible with Cokin Z Series Compatible with Cokin Z series. It is made of high quality Resin to provide the excellent light transmission. Graduated filters, specially designed for color, arose from the advances in color photography. These filters are made in a wide range of compound colors that blend harmoniously into the image. They permit selective color enhancement or modification without changing the subject. NOTE: Filter only. Camera and the slot holder are not included.