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Message: <blockquote data-quote="Red Rover" data-source="post: 92057" data-attributes="member: 10060">The AF fine tune is a setting adjustment with a range of +/- 20 to tune multiple lenses to a particular body which will memorize the settings for each lens. It is highly unlikely that multiple lenses would each require the same settings so it would not be possible to have them all "adjusted properly" by Nikon. That is why the fine adjustment is available in the first palce.My D7000 and 17-55 f/2.8 set at the maximum -20 fine adjustment setting was still backfocusing. I sent them in and had them callibrated and now it requires +6 and is sharp. My 70-300 VR requires a +2 at 300. With a zoom you can test it at the short, middle, and long focal lengths and set the fine adjust at the average (they will most likely vary slightly at each FL). Or, some set the fine adjustment at the FL they use most on that particular lens.</blockquote>