How a Polarizer Filter Works – PictureCorrect

How a Polarizer Filter Works – PictureCorrect: "A polarizing filter on your camera is probably the most important filter you can use. It removes polarized light from the image, thus reducing reflections and glare, while at the same time increasing colour saturation – especially that of a blue sky. A circular polarizing filter works by rotating an outer ring to vary the amount of polarization that is being filtered. This effect is difficult to mimic on the computer."