[Hogan1984]

Hi

I'm thinking of buying a Lee 105mm circular polariser kit but want to know if these work fine with wide angle lens? Currently I use a 7d and shoot a lot at 10mm but am looking to upgrade to a 5D and 17-40mm lens, is this likely to cause me vignetting problems or am I better off getting a thin 77mm polariser to screw on before I add the Lee system? Any advice is welcome...