I'm sure you're right Mathew. I guess my copy must have had back focus problems. Used that lens in Istanbul, Turkey and none of the pictures were really sharp. What a disappointment. I'm not in Istanbul too often. Probably should have sent it back to Nikon but if not for the God awful lens creep, I just didn't want to use the lens under any circumstances. I understand the new lens has a lock on it to prevent lens creep. A good friend of mine and certified Canon photographic mechanic, could have checked for back or front focus issues with this lens, but as I said, I was so disappointed I never got it fixed. I have too many other DX zoom lenses that are better. I have since heard of others that have had trouble with their 18-200mm lenses. Must have been a bad batch. But, if you get a good one it becomes the best thing since the discovery of prunes. Enjoy your Nikons and their fine lenses.