Red color enhancement filter that beautifully enhances the evening sky. - Brand: Kenko - Model Name: MC TWILIGHT RED - Filter Diameter: 67mm - Color: Red - Filter Type: Color Enhancement Filter Thank you for viewing. I purchased this new and attached it to a lens, taking about 3 shots. I removed it from the lens immediately afterward and have not used it since. Currently, I am storing it in my room, away from ultraviolet light.