【Enhance Color & Contrast】CPL filter can enhance the color and contrast, and remove non-metallic reflections such as water, and glass to show the true color, especially used in white cloud and blue sky photography.  【Waterproof 18 Multi-Layer Coated】18 multi-layer coating reduces reflection, and glare and improves color saturation and contrast.  【Imported AGC Glass Avoids Glares】Made by Japanese imported AGC glass, no effect on the image color, restores the natural color.  【Ultra-Slim Frame Avoid Vignetting】Only 5.3mm thickness frame, there is no vignetting even on wide-angle and telephoto lenses, and the CNC-non slip frame helps install and remove the filter easily.