cicular polariser
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madhouse
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The polariser will need to be rotated to get the effect you want as it depends on the light source as to the best position of the glass. Look through the viewfinder as you rotate it and you will see the difference.
If your lens rotates as it zooms you'll need to remember to check the polariser each time as it will rotate with the lens. It's best to check each time if you can anyway.
If your lens rotates as it zooms you'll need to remember to check the polariser each time as it will rotate with the lens. It's best to check each time if you can anyway.
HoppyUK
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Polarising filters are all about rotation and angles.
For blue skies, the easiest way is to look through the viewinder and rotate it until you get the best effect. For best results the sun needs to be behind you, or at least to the side.
To check out the effect on reflections, find a dark shiny car and stand three-quarters view to the front. Rotate the filter (you don't need a camera for this) and watch how the reflections on the windscreen and bonnet change, and note the position of the mark on the ring. Now turn that ring through 90 degrees and you'll see the reflections on the bonnet have returned, but those along the sides have vanished.
Now look along the sides of the car and you should notice that the reflections are more reduced on some parts than others. If you now move forward you will see that area of strongest reduction move along the car with you. That spot indicates the angle of maximum polarisation, which is 37 degrees to a flat surface.
For blue skies, the easiest way is to look through the viewinder and rotate it until you get the best effect. For best results the sun needs to be behind you, or at least to the side.
To check out the effect on reflections, find a dark shiny car and stand three-quarters view to the front. Rotate the filter (you don't need a camera for this) and watch how the reflections on the windscreen and bonnet change, and note the position of the mark on the ring. Now turn that ring through 90 degrees and you'll see the reflections on the bonnet have returned, but those along the sides have vanished.
Now look along the sides of the car and you should notice that the reflections are more reduced on some parts than others. If you now move forward you will see that area of strongest reduction move along the car with you. That spot indicates the angle of maximum polarisation, which is 37 degrees to a flat surface.
Cuchulainn
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One thing to remember is that if you set up the polariser for (say) a landscape portrait and then decide you want to take a portrait orientation pic, you'll need to rotate the polariser by 90 degrees to compensate for the camera's rotation. Completely obvious, but also very easily forgotten!
boyfalldown
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I thought that reflections from metallic surfaces weren't polarised, so it shouldn't have an affect on a car?
HoppyUK
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It's got paint on it, which insulates the electro-magnetic properties of the metal. Won't work on chrome though
boyfalldown
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It's got paint on it, which insulates the electro-magnetic properties of the metal. Won't work on chrome though
cool - makes sense.
what if its metallic paint though
