I've buying a Nikon 18-200mm lens (like everyone else, I know) and I'm checking out UV filters for it. I have my eye on a normal B+W 2C 72mm. Here's the link: [ame=http://www.amazon.com/B-W-Violet-Coated-Filter/dp/B0000BZL9J/ref=sr_1_4?ie=UTF8&s=photo&qid=1236147073&sr=1-4]Amazon.com: B & W 72mm UV (Ultra Violet) Haze Multi Coated (2C) Glass Filter #010: Camera & Photo[/ame] However, someone with a 18-200mm said about this filter, "The only problem is that the ring is so thick that on my camera I get vignetting in the corners of most of my photos." (first question... is this really due to the filter or the lens? Does anyone have this lens?) Theoretically if it is the filter, this thin filter should solve the problem: [ame=http://www.amazon.com/B-W-Violet-Coated-Filter/dp/B0000BZL9L/ref=cm_cr_pr_sims_t]Amazon.com: B + W 72mm UV (Ultra Violet) Haze Wide Angle Slim Mount Multi Coated (2C) Glass Filter: Electronics[/ame] However, part of the reason I want the filter is to protect my lens in case I'm stupid enough to drop it. Would a thin filter give me the same "my lens is dust by my lens is unscathed" kind of protection?