Bower 67mm CPL filters are specially manufactured from superior high quality optics to deliver premium digital & video photography. This  filter is used to increase color saturation darken blue skies so white clouds stand out and removes unwanted reflections from surfaces such as water and glass, it will also reduce the softness scenery caused by atmospheric haze, The polarizer filter helps to reduce glare and improve color saturation. When filming from a quadcopter, a large amount of light is reflected back up towards the camera. The polarizer reduces the amount of glare bouncing off the ground.