yes as the 10-20 takes a 77mm and the tamron takes 67mm...but they are both tiffin CP's and both set to fullest filter in both of these shots...the wide angle obviously effects the way they polorize though...I assume because of the acute angle the light takes to get that gigh and low when coning thru the lens ( passes thru much more of the glass at those angles and that is also why there appears to be a gradient effect as it gets to the parimeter of the photo...I'm finding the effects all very interesting...
