The Warm Polarizer Filter combines the benefits of the Linear Polarizer with the warming effect of the 812 Color Warming filter making it ideal for portraits and scenics. Polarizers provide color and contrast enhancement. Reflected light often shows up as whitish glare that washes out color in an image. A Polarizer corrects this problem producing deep, dramatically blue skies. It also removes glare from non-metallic surfaces, such as windows and water. Color saturation in general, especially outdoors, can be improved significantly.