Cavision 4x5.65" Linear Polarizer Glass Filter

The polarizer filter reduces light entering the lens that is oriented in a single plane (polarized light) without affecting color temperature. Light reflected off glass or water, as well as some of the light emitted from the sky on a clear day, is polarized. When rotated to the appropriate angle, the polarizer can largely eliminate reflections off glass or water. Furthermore, the polarizer will reduce glare and excess sky light, thereby increasing sharpness, contrast and color saturation of the image.