A polarizing filter can transform outdoor pictures from disappointments to deeply satisfying shots, and has a place in every landscape photographer’s camera bag. But they won’t always have the effect you expect and they won’t always improve the picture, so it is worth learning how to use them.
The Circular Polarizing FilterA polarizing filter cuts out or reduces certain elements of the light as it enters the camera, which can greatly enhance the image. But the effect depends on the angle of the sun in relation to the subject. The effect is greatest on pictures taken at right angles to the sun, and is reduced or negligible when the sun is directly behind the camera.
The most common type of polarizing filter is circular. The holder screws onto the front of an SLR camera lens and you will need to rotate the filter within its holder to strengthen or reduce its polarizing effects. The “correct” rotation will vary from shot to shot so you will need to adjust it each time you change the direction of the camera.
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