I'm about to pull the trigger on a lens, but the question that halts me is in the Kaesemann option for a circular polarizer. I already have a B+W in a larger filter size.... and am quite impressed with it. Any experience with it...... Kaesemann ? Is it worth the few extra bucks? When talking around $150... a tenner or a score either way is meaningless, unless there IS a concrete reason - one way or the other. But in the same breath, I'd just as soon save that tenner if the diference is negligable. Cheers.