STO Circular Polarizing Filter for Phantom 3 (Silvery) [94092134] For DJI Phantom 3 Advanced and Professional. A polarizer is a must-have optical filter for landscape photographers as it can darken blue skies, increase color saturation and bring out details in clouds. It provides color and contrast enhancement that some movies are even shot throughout using the polarizer to eliminate reflections of human skin with dramatic effect. A polarizer also removes glare from non-metallic surfaces, such as windows and water. Color saturation in general, especially outdoors, can be improved significantly. Do not touch the filter directly. To prevent scratches, please use an air blower to remove the dust before cleaning the filter. Aluminum Alloy frame+ light plastic polarizing filter applied