I've asked this in a different form on the rangefinder forum, but I'm interested in getting a broader view on this question. I have a lens with a fine web of cleaning marks on the front element, which I am considering returning for a refund. What I want to know is whether there is a substantial group of people who use such lenses without problems or if such marks bother people as they do me. I figure for another $100 or so I can get a cleaner sample. But, the negatives from this lens look pretty good. I'd be interested to hear comments on this .