How does the circular polarizer work?

Question: How does the circular polarizer work!?

what does the movement do!?Www@QuestionHome@Com

Best Answer - Chosen by Asker:

think of a polarizing filter as tiny window blinds allowing light to pass through in one plane only!. As a result, light coming in from a different angle is blocked by the "blinds!."

Most often used to remove reflection, the angle of the filter is changed to counter light bouncing off the subject causing glare!. When pointed at the sky (clear sky) the darkest part is at 90 degrees to the filter!. Thus at high noon, you will get the darkest part of the sky at the horizon!.

A handy way to view this is hold your thumb and forefinger at 90 degrees pointing your thumb at the sun, the sweeping arc of your forefinger will trace a path of the darkest part of the sky with a polarizing filter in place!. Www@QuestionHome@Com

It has to do with angles, the angle of the sun/light in relation to the camera, which is why you turn the polarizer until it has the most effect!.

If you hold up two polarized sunglasses in front of each other, then turn one of them by 90 degrees, you'll see it cuts out nearly all of the light!.

You can find a basic explanation here http://www!.camerapedia!.org/wiki/Polarize!.!.!. going into it in full detail gets very technical!.Www@QuestionHome@Com

Helps to make blues bluer, greens greener, and eliminates reflections in glass!.

When you put it on your lens, you can then turn it to effect the right area of the image!.Www@QuestionHome@Com

The answers are correct, but here is a visual aid to help you see the difference!.

http://www!.flickr!.com/photos/samfeinstei!.!.!.Www@QuestionHome@Com