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Old Jan 5, 2004, 5:36 PM   #1
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Default polarizing filter use

Do I turn the polarizer filter after I press half way on my shutter button or before? Wondering which way is best.
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Old Jan 5, 2004, 7:22 PM   #2
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Default Re: polarizing filter use

Quote:
Originally Posted by giro
Do I turn the polarizer filter after I press half way on my shutter button or before? Wondering which way is best.
Do it before half-press the shutter. When you half press the shutter release button, focus and exposure will be locked in most camera, and, as a result, the exposure compensation that is needed for the polarizer will not be applied.

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Old Jan 5, 2004, 9:22 PM   #3
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I turn it after, because otherwise the camera doesn't allow much in the way of polarization. I guess it's whatever floats your boat, but I prefer after I've pressed the shutter halfway down.
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Old Jan 8, 2004, 5:33 PM   #4
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Are you using a circular polarizer? If not you should be. Using a linear polarizer with auto focus cameras may throw off the accuracy of the exposure meter.
As you apply polarization the exposure changes and may not be compensated for if you have previously locked the exposure by depressing the shutter button 1/2 way.

Also the direction of light has a lot to do with how much an effect the polarizer has. The more of an effect the polarizer is having the more exposure compensation is needed. In addition to darkening blue skies a polarizer can reduce reflections when shooting reflective surfaces such as through glass or reduce the reflections on foilage resulting in more saturated colors.
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