billozz Loc: Birmingham, England

i have just bought a circular polariser, i have a uv filter fitted and wondered if i should remove the uv or in what order i should have them on my camera
thanks
Bill

MT Shooter Loc: Montana

These 2 filters can be "stacked" if you want to, but it is advisable to removed the UV to avoid possible image degradation it may cause.

MtnMan Loc: ID

Remove the UV when using the poloarizer. Everything you add on your lens causes image degradation.

windshoppe Loc: Arizona

And on many lenses the corners will be dark due to the filters protruding too far forward.

chapjohn Loc: Tigard, Oregon

I stack UV and CPL most of the time. There a few times I take the CPL off. I also (when desired) stack a VND on top of the CPL.

MtnMan Loc: ID

If you look closely you'll probably see some loss in resolution...unless your lenses are such low resolution to start with.

LGilbert Loc: Earth

Digital sensors are sensitive to some UV, far less than film. It used to be that the usage of a UV filter caused dramatic improvement in sky blue when using film. I don't see that improvement with my 60D using a quality UV filter. I have them on my camera mostly for protection. "Protection" filters are also available at significantly less cost that are, essentially, just glass with antireflective coatings.

Certainly, regardless of the quality of the UV filter, some diffusion of light will occur, although the best filters only register about 1-3% transmission loss. CPL and other types of filters are susceptible to similar transmission losses. It's a trade off, you gain something at the cost of something else.

I agree with MtnMan that stacking filters multiplies the inherent losses from the use of them, however the sum degradation in many cases might not be of sufficient annoyance to warrant the extra step. Not every picture has to be a masterpiece. Do a test and see if,given the requirements of the moment, whether the ease of stacking the filters presents significant enough image degradation to warrant the extra effort of swapping.