TOKYO GRAPHER OPF-550L 77mm The OPF (Optical Preset Filter) is a new type of optical filter for camera lenses that adds to your photos the glare of light outside the camera's viewfinder and the colors of the air that change with the seasons depending on the angle and intensity of the light. The "550" in OPF 550-L represents the wavelength of light, 550 nanometers, which vividly captures green and blue colors, and "L" (Light) represents the amount of light diffusion by special glass. By combining these two elements, new expressions that have never been possible before are made possible. Accessories: With case Thank you for viewing. Used once and stored in a dehumidified storage. No box. Case has scratches. Thank you.