http://www.nikonchat.com/nikon-uv-filter-67mm/

I have a UV filter I do not want to remove my lens. "I can stack a polarizer SLIM and not get the bullets?
I have a lens Nikon DX 18-70mm. I put on a B + W 67mm MRC UV filter. Sunpak 67mm Stack polarizier just to see what it is, I get these black spots. I am sure that the filter lenses are thick and so as I got the black corners. What if I get a Polaorizer Slim Battery and 67mm UV? It would ensure that at all? or I have to take full UV lens to just use the polarizer by itself?
Yes, you can stack a polarizer on top of UV radiation. I do not think you need a thin because they do not get bullets on a target 18-70mm. However, if necessary, get the UV filter as well along with Slim Slim polarizer. The wide angle lens as a 10.5 mm DX lens vignetting would have a truth. Do not remove the UV filter. The B + W is a very good, especially to perform multiple MRC. The great works either indoors or outdoors. By the way, good choice in the B + W MRC filters, and the love I have too.
Hoya 67mm 3-piece Filter Kit (includes a UV, CPL, 81A + Filt