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Old 02-01-2009, 03:48 PM
Jon Jon is offline
Senior Member
Join Date: Oct 2008
Location: Kensington, MD USA
Posts: 154

A polarizer will cost you about 2 stops of light; you don't want to leave one of them on your lens all the time. A UV filter will typically let over 95% of the light through, so will have negligible effect on exposure.
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