Originally posted by lodgeporter10 Hi, Picked up filter kit (Sunpak) at Walmart to protect the lens on my K10D. There are two filters, do I use the UV filter or both. Other being a Circular Polarizer. Thank You for your help. Ken J.
No need to ever use them both: it's quite preferable not to, for IQ reasons. (UV's can be left on to protect your lens, but that's pretty optional: I rarely do, myself, unless conditions are very lousy or the lens can't take a deep enough hood/is particularly vulnerable, or sometimes if I intend to trade up said lens in a hurry. But, then again, I'm very used to handling cameras and am not so prone to mishap. Most beginners do fine to just leave a UV on there and forget it.
Anyway, the only real problem with stacking filters is that it increases the possibility of losing image quality, creating internal reflections, etc. So one at a time will be optimal for you. If you want to use the polarizer, just swap em.