【Flexible Exposure Control】 The variable ND2-400 filter offers limited 1-9 stops of light reduction. Rotate to precise stops for desired ND values and perfect exposure. Note: A dark X pattern may appear at maximum aperture. This is normal when the variable ND filter, with its two polarizing filters aligned at a specific angle, interacts with certain lenses and focal lengths. A protective cap with lanyard is included for the variable neutral density filter 【Dreamy Cinematic Diffusive Effect】 The black diffusion 1/4 filter smooths out skin texture and adds a dreamy, cinematic effect to your portrait photography, selfies, and personal vlogs 【Multiple Protective Coatings】 Multiple protective coatings on both sides of the optical glass shield the filter from water, oil, dust, and scratches. A cleaning cloth is included for daily maintenance 【Slim Aluminum Alloy Frame】 Both filters features a slim aluminum alloy frame to effectively avoid vignetting on wide angle lenses. Ideal as content creator essential photography gear and influencer must have digital camera accessories 【How to Select the Right Filter】 Please check the lens filter thread size before purchasing. It is typically printed next to the diameter symbol (ø) on the front or barrel of the lens