Polarizer filter

The Polarizer filter

The Polarizer filter comes in two types linear and circular.

Effects

1. Blue sky is deepened.

2. Clouds are emphasized.

3. Glare is reduced.

4. Colour saturation is increased.

5. Reflections will be reduced or eliminated in water and glass.

6. A polarizer will have a 2 stop or ND 4 light reduction allowing 

    for slower shutter speeds.

7. Use a polarizing filter to reduce glare when taking dusk and

    dawn coastal photographs.

For the strongest effect the camera/filter must be at right angles

to the sun.

Care with Polarizers

Note : Do not use a polarizing filter if you are taking multiple 

          photos to stitch together later to make a panoramic image 

          as the polarizing effect will change as the camera pans 

          around the scene in an arc.

Note: Take care using lenses wider then 28mm as polarization

          across the sky may be uneven.

Note: If the front end of the lens rotates to focus then focus first

         then adjust the polarizer.

Note: Watch your shutter speed, a polarizer will have a 2-stop

          light reduction, it will reduce your shutter speed if you are

          taking handheld photographs.

Note: It is not unusual to use a polarizer and an ND graduated

         filter together but remember the more filters you use the 

         more your image quality will be reduced.

Note: Do not use a polarizer when photographing rainbows, as

          a polarizer will remove a rainbow from you scene.