I'm a little bit confused here and not sure about the difference between Kenko & Hoya. I understand that Kenko is 'owned' by Hoya and partners up with Tokina (I think) but what kind of difference am I looking at in the filters? Does anyone have any experience with both and/or can shed some light here? Am I ok going with the Kenko Pro 1 or should I be looking at the Hoya? I'm going to buy a decent polarizer in 77mm with step down rings for my other lenses. One other question, the Hoya 'Blue' line is a step above the value priced 'Green' and below the SMC ones right..?