Reply #14 - November 07, 2011, 05:25:19 AM
A polarizer will indeed reduce reflections. But, what reflections are you trying to reduce? For a portrait you want reflections of the catch lights in the eyes. A polarizer also only blocks light waves coming in certain directions. This is why a circular polarizer is turned to dial it in to block reflections that come from the side. Straight on they don't do too much. Go find some water outside with the sun shining on it and play around with your polaraizer, that is where you will really see what it does.
As far as a UV filter goes, most modern digital sensors don't need them unless you're going to do some long exposures straight up at the sun. In the early days the sensors themselves weren't coated and could potentially be damaged by intense UV light. Nowadays, not so much. Also, unless you're using a tanning bed for a light source UV is going to be a non-issue in a studio setting.
Everything has a purpose, and there is a purpose for everything. Experimenting is great. But make sure you're not doing something just because it's there. Don't feel bad though, we've all done it. Most of us probably have a drawer full of gizmos that we believed were to be used all the time.

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