20mm Neutral Density Filter with Mounting Bracket - Compatible C/SM1 Socket, Optical Transmittance 0.01% to 10% 1 Piece (2% SM1 Thread)

20mm neutral density filter designed to reduce visible light with a transmittance range of 0.01% to 10%, perfect for various optical applications. It features advanced anti-reflective coatings that minimize backward reflection, improving the performance of optical systems in the 400-700nm wavelength range. Versatile mounting options with circular base for 20mm filter belt, compatible with SM1 and C-Mount internal and external threads for easy installation. Durable aluminum alloy construction with anodized treatment ensures longer life and excellent wear resistance. Each pack includes 1 piece of filter, making it the ideal choice for photographers, video operators and optical equipment enthusiasts looking for reliability.