woah thanks for the photo, makes things so much clearer. so i believe that the lee foundation set has its polarizer mounted on the outside?
btw, do your think that its a waste to use a 100mm instead of 85mm filter on a widest 17mm focal length?
Yes. The Lee polarizer requires you get an additional attachement and screw into the filter holder. The whole setup is quite expensive and not for those with weak hearts (and wallets).