A POLARIZING FILTER REMOVES UNWANTED REFLECTIONS FROM NON-METALLIC SURFACES SUCH AS WATER AND GLASS. THEY ALSO ENABLE COLORS TO BECOME MORE SATURATED AND APPEAR CLEARER, WITH BETTER CONTRAST. THIS EFFECT IS OFTEN USED TO INCREASE THE CONTRAST AND SATURATION IN BLUE SKIES AND WHITE CLOUDS. POLARIZING FILTERS DO NOT AFFECT THE OVERALL COLOR BALANCE OF A SHOT. A CIRCULAR POLARIZER FILTER IS GENERALLY REQUIRED IF YOU WANT TO USE THE “AUTO-FOCUS” FEATURE IN YOUR CAMERA. IF YOU ARE MANUALLY FOCUSING YOUR CAMERA, YOU CAN SAVE SOME MONEY BY USING A LINEAR POLARIZER. THESE FILTERS ARE FOR ALL VIDEO, STILL, DIGITAL AND FILM CAMERAS.
