Add the Neewer ND4 Camera Lens Accessory with Cpl, ND4 when your setup needs a simpler approach to creative exposure and image control. Control the image at capture time for a more intentional final look. The Neewer ND4 Camera Lens Accessory with Cpl, ND4 is an easy addition for creators who want more control over creative exposure and image control. Its listed specifications include Cpl and ND4. The listed aluminum alloy / optical glass construction keeps the design suited to regular use.