Circular Polarizers 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.
Think of a Polarizer as Sunglasses for your camera.
A Circular Polarizer has the same effect as a Polarizer and is used on cameras with beam splitting metering systems commonly found on auto focus SLRÃ¢s (for most 35mm auto-focus cameras see your camera manual). The standard Circular Polarizer blocks 1.5 stops of light.
Essential general-use outdoor color filter
Produces deeper skies and minimizes reflections in black and white and color photography