I'll be looking at purchasing a 110XL sometime soon...and want to steer clear of any possibility that the lens might be afflicted with the "fog issue."

My understanding is that Schneider understood and corrected this problem fairly early on...and that there is an acknowledged serial number range to avoid for folks like myself looking to purchase this lens.

Have done some web searches...lots of info on "the problem," but nothing definitive regarding potentially "toxic" serial numbers. Anyone?