I'm picking up one of these lenses in a few months. I was planning on picking up a B+W CP. I have one for my other lenses and love it. I'm curious why no-one mentioned them. Is there some reason not to get the B+W or is it just that you guys happen not to have B+W and I'm reading into this?
I'm using a Hoya. I have the B+W in a smaller size, from years ago, but I found that while the B+W's are optically very good, the rings seem to lock to the lenses with alarming frequency and tenacity. I've never had this issue with any other brand of filter.