Albinar 49mm Split Gradual Neutral Density ND Pro Filter Gradual Split High Quality Neutral Density Filter ND2 to 0 Increases control of depth of field & Exposure in very bright to very dark scenes Split ND Filter Eliminates bright images that are washed out on one side of the frame ie: Horizons Equally effective in color or black and white photography Circular Filter Rotates 360. Includes Filter Case