What is polarized light
We see and photograph reflections of light from the surfaces surround us. If objects did not reflect light we would not see them. Upon reflection, however, the quality of the light may change with undesirable side effects for photography. Before it reflects from a surface, light wave moves in all directions very much like a pipe cleaner with its bristles coming out in all directions. When it reflects from a surface, depending on the angle, reflective surface qualities, our angle of observation, the part of all of the light may become polarized. A polarized light wave no longer moves in all directions but in one direction much like a recording tape, flat. [Read more...]
A polarizing filter is an indispensable tool for most photographers. It helps remove reflections from most nonmetallic surfaces, increases the color saturation of foliage, darkens the blue sky for dramatic effects, and so on. I try to carry one with me anytime I go out to take photographs. The operative word here is “try” since I don’t always remember to pick one from the camera bag. Luckily, digital domain gave us some tools to compensate for our forgetfulness. This is how I developed a Photoshop technique that I call Digital Polarizer since the entire effect is achieved through digital manipulation. 
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