Neutral Density filter evenly reduce the amount of light passing through the lens without effecting color. Ideal for reducing bright light in large aperture situations when a narrow depth is field is needed. Neutral Density Filters are often used to achieve motion blur effects with slow shutter speeds High Quality Optical Glass 6 stop Neutral Density Filter ND 1.8 64X Increases control of depth of field Eliminates overly bright, washed-out images. Balances exposures Equally effective in color or black and white photography Includes Filter Case Made of optical glass Same as Schott (same glass found in B&W & Heliopan filters)