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Message: <blockquote data-quote="Don Kuykendall_RIP" data-source="post: 501780" data-attributes="member: 6277">I have fine tuned my wife's 18-200 for her D7000 and My 18-140 for my D7100 and have been happy with the results on both. My 70-300 still needs a little work I think. I plan on tuning it again at 70mm, 180mm and again at 300 and then averaging the results and using that as my setting. I truly think there is no perfect method but doing nothing generally is not optimum. I remember someone recently here said they tuned at several zooms and averaged them. I am not quite sure who it was because I am old and the memory is going fast but it sounded like it might be a pretty good idea or at least worth a try.</blockquote>