Use of CPL filter
My walkaround lens is Nikon 18-200VR lens for D7000.
Nikon NC filter is always attached to protect the lens.
For outdoor photography, I attach a polarizer filter (Marumi EXUS CPL) to the NC filter.
My question is whether I should remove the NC filter before attaching the CPL.
I thought that attachment of two filters (NC and CPL) to a lens might degrade the quality of pictures. Please advise me.