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Nikon DSLR Cameras
D7100
Autofocus Hunting
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<blockquote data-quote="spb_stan" data-source="post: 635508" data-attributes="member: 43545"><p>Acting the same on the D7000 and D7100 sure suggests a problem isolated to the lens. The lens contact suggestion cleaning is very unlikely to fix anything, the only "dirt" that would be able to be cleaned off is not dirt but oxide of the alloyed metal mixed with the gold plating. Alcohol would just make it oxidize faster. A deoxidizer chemical would be needed in the rare event that contacts were oxidized. If there was a contact problem the error message would display.</p><p></p><p>Periodically body/lens alone or combined just need adjustment for AF to remain consistent. Both my D7000 and D800 needed it and my 70-200 2.8 needed alignment suddenly each time. They get hard ridden, so I am amazed how stable they are, but once, during a paid event shot my D800 stopped focusing well on any longer focal lengths, say over 110mm but was ok at 70mm. That turned out to be a len calibration problem. Another event my 24-70 stopped focusing well on wider angles, worse on the D7000. Again minor adjustment done with 1 day turnaround. The lens was the one needing adjustment. Another time my D7000 became unreliable on any lens with 2.8 or slower with any lens and another quick alignment, this time to the D7000. It came back focusing more sure than even when it was new. It never seemed to have a problem after 140,000 frames but there was a sureness of the lock that I never saw before. It now locks without any hunting giving the impression it is more consistent than the D800 using the same lenses</p><p></p><p>So what you are describing sound familiar and it suggests the lens needing adjustment.</p><p>How do you like full time RV living? Sounds both like fun and a challenge. Good luck!</p></blockquote><p></p>
[QUOTE="spb_stan, post: 635508, member: 43545"] Acting the same on the D7000 and D7100 sure suggests a problem isolated to the lens. The lens contact suggestion cleaning is very unlikely to fix anything, the only "dirt" that would be able to be cleaned off is not dirt but oxide of the alloyed metal mixed with the gold plating. Alcohol would just make it oxidize faster. A deoxidizer chemical would be needed in the rare event that contacts were oxidized. If there was a contact problem the error message would display. Periodically body/lens alone or combined just need adjustment for AF to remain consistent. Both my D7000 and D800 needed it and my 70-200 2.8 needed alignment suddenly each time. They get hard ridden, so I am amazed how stable they are, but once, during a paid event shot my D800 stopped focusing well on any longer focal lengths, say over 110mm but was ok at 70mm. That turned out to be a len calibration problem. Another event my 24-70 stopped focusing well on wider angles, worse on the D7000. Again minor adjustment done with 1 day turnaround. The lens was the one needing adjustment. Another time my D7000 became unreliable on any lens with 2.8 or slower with any lens and another quick alignment, this time to the D7000. It came back focusing more sure than even when it was new. It never seemed to have a problem after 140,000 frames but there was a sureness of the lock that I never saw before. It now locks without any hunting giving the impression it is more consistent than the D800 using the same lenses So what you are describing sound familiar and it suggests the lens needing adjustment. How do you like full time RV living? Sounds both like fun and a challenge. Good luck! [/QUOTE]
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D7100
Autofocus Hunting
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