I will be receiving my RRS Carbon tripod and Panoramic head next week!!! EXCITED! ... My question is...Would it be okay to use a CPL and or GND's since I will not be rotating my camera but sliding it side to side for panoramas? I am assuming the type of lens and light difference will effect this as well, but probably not as bad. I will however be using a Zeiss 21mm Distagon, canon 100-400L, canon 17-40. Should I be overly concerned about uneven colors using these filters? I will not be using AWB either which should help a bit. Manual mode and AE Lock as well. Any thoughts?