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04-19-2011, 08:28 AM   #1
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filter factor for circular polarizer

I can't seem to find an answer to this through search functions....

Is there a "general" filter factor for circular polarizers?

The reason I ask, is that I mounted one on my FA 50/1.4 with my new Kx and was sort of shocked at how the camera reacted when aimed at a brightly lit window. Auto ISO went to 800 and aperture set to 1.4. I know I was inside...or am I just being naive about this particular situation.

I know generally you wouldn't use a polarizer inside...unless you had a really, really bad surface glare problem and lots of light.

Thanks!

04-19-2011, 09:08 AM   #2
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Generally, 1 to 2 stops.
04-19-2011, 04:18 PM   #3
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The amount of light reduced by the filter changes with its orientation. If the image is too dark or light, give the filter a twist.
04-19-2011, 04:25 PM   #4
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Shoot in manual mode. That way, you control the camera rather than allowing the camera to control you.

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