Albinar Gradual Split Neutral Density Filter is designed to allow you to control exposure when shooting a scene in which one side of frame is brighter by cutting the light to give a much more equal exposure throughout the frame. The Filter is mounted on a Circular Frame which rotates to give you even more control.The Albinar Split Neutral Density Filter is gives you a gradual light reduction from 0 to 1 stop.Neutral Density filters evenly reduces the amount of light passing thru 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 have many different uses such as: * Increases control of depth of field. * Eliminates overly bright, washed-out images. Balances exposures * Equally effective in color or black and white photography.Specifications: * Filter Thread Size: 49mm * Filter Color: Black * Neutral Density Grade: 0 - 2Content * 49mm Split ND Filter * Albinar Filter Case * Lifetime Warranty