Hi. Just wanted to ask a couple of questions of those of you using the Nikon 90mm f4.5 lens. I understand that it accepts 82mm filters on the front, but is there a need to use a step-up ring to allow clearance of the front element and prevent any attached filter coming into contact with the lens? The reason I ask is that I have found that this is necessary with the 110XL and other wide lenses. I was thinking of a step-up to a 95mm filter? Also do the B+W Extra Wide filters allow greater clearance or just wider diameter? Thanks. Paul