Feature: 1. Shoot Sences: ND filters are more used to shoot slow door special effects, such as flowing clouds, water, silk waterfall light trails, flowing ghosts, etc. 2. Protective Performance: The lens has waterproof, oil proof, anti fouling, and anti scratch performance, which protects the lens from dust and scratches. 3. Main Function: The main function is to reduce the amount of light entering the camera, extend the exposure time, and effectively reduce the shutter speed. 4. Multilayer Coating: Double sided multilayer low reflection and dimming coating to achieve precise control of the amount of light entering the glass and reduce reflectivity. 5. Block Light Ability: The number behind ND represents the ability of the ND lens to block light. The larger the number, the stronger the ability to block light. Specification: Item Type: ND Filter Material: Aluminum Alloy + Optical Glass Color: As Pictures Shown Applicable Models: Digital Cameras with an Interface Diameter of 72MM/2.8IN and 77MM/3.0IN. Package List: 1 x Filter1 x Storage Box