This is the Camlink Neutral Density ND4 Filter 46mm [CL-46ND4] This neutral density filter subdues intense light in skiing and beach scenery and is useful to reduce shutter speed and depth of field. Features: Subdues intense light in skiing and beach scenes Useful to reduce shutter-speed depth of field Reduces light transmission to 1/4 (NDx4) Recommended for video camcorders, digital photography, film photography Available in sizes from 30.5 up to 77mm Specification: Available: Camlink Neutral Density ND4 Filter 30.5mm (CL-30.5ND4) Camlink Neutral Density ND4 Filter 46mm (CL-46ND4) Camlink Neutral Density ND4 Filter 49mm (CL-49ND4) Camlink Neutral Density ND4 Filter 52mm (CL-52ND4) Camlink Neutral Density ND4 Filter 55mm (CL-55ND4) Camlink Neutral Density ND4 Filter 58mm (CL-58ND4) Camlink Neutral Density ND4 Filter 62mm (CL-62ND4) Camlink Neutral Density ND4 Filter 67mm (CL-67ND4) Camlink Neutral Density ND4 Filter 72mm (CL-72ND4) Camlink Neutral Density ND4 Filter 77mm (CL-77ND4) ...Contact us if you need more help.