 Steve Warren |
Exposure compensation for polarizers Hi all, I am starting to experiment with polarizers. Can anyone tell me how much exposure compensation I should use? Thanks!
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Kerry L. Walker |
If your amera has TTL metering (the Maxxum does) you don't need any compensation. The camera meter will handle it.
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robert G. Fately |
Steve, if you are using a modern camera with through the lens metering, the meter will take the polarizer into account. Otherwise, you should check with the filter manufacturer as there can be variances between polarizers. Nevertheless, the compensation is typically 1-2 stops. However, be aware that the level of 'darkening" a polarizing filter creates depends on the position of the sun in relation to the filter and the orientation of the filter itself. You can see the latter effect by holding the filter in front of your eye outdoors and just turning it clockwise (or ccw). You'll see the sky darkens at some point and then lightens up again. So there is no simple answer if you're using a meter outside the camera. If you are using a polarizer with a modern camera, though, be sure to check that the filter is compatible. That is, original (older) so-called "linear" polarizing filters will not work properly with current cameras - they mess up both the metering accuracy and the focusing system's ability to focus properly. For this reason you should use a "circular" polarizing filter on cameras with TTL metering and auto-focus made in the last 5 or so years.
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