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.
Polarizer/Circular Polarizer • Essential general-use outdoor color filter • Produces deeper skies and minimizes reflections in black and white and color photography • Combine a Polarizer with a Red 25 for incredibly dramatic black and white landscapes • Can be rotated to achieve desired effect • Use the Tiffen Polarizer with the enhancing filter for more dramatic effects • Available for Wide Angle lenses
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 SLR's (for most 35mm auto-focus cameras see your camera manual).
Area of sky most effectively polarized with a Circular Polarizer: Point your index finger at the sun. With your thumb extended at a right angle (90°)