True Color Pro Nano CPL for Swift System. Polarizing filter with a diameter of 67 mm. Removes unwanted reflections from non-metallic surfaces. The exclusive polarization film prevents the yellow tint that occurs with most CPL filters. Waterproof and oil-resistant multi-coating (nano-coating). Blackened edge for increased durability. Knurled aluminum filter ring. Polarizing filter for high-contrast images. The polarizing filter blocks light of a specific polarization direction, thereby minimizing reflections on glass or water surfaces. Additionally, a polarizing filter enhances colors or contrasts in landscape photography: the blue sky appears even bluer against the white clouds, and the colorful leaves in autumn look more vibrant and colorful.