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D7000 auto focus tune - Houston, I have a problem!


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richardd300

Dyserth, UK
4557 posts

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richardd300 Silver Member Nikonian since 19th Apr 2009
Fri 19-Nov-10 03:34 PM | edited Fri 19-Nov-10 09:11 PM by briantilley

I have uploaded 2 files, the first is with the D7000, the second with a D700. Both with the Nikon 80-400mm fitted, both at a focal length of 200mm. The images have been cropped to 100%

I've had my D7000 for a week and until today all was well. For the last 7 days I've taken many images with the camera with a Nikon 24-70mm f/2.8 and a 24-120 f/4.5-5.6 and all seemed fine. I bought the D7000 for BIF and far wildlife, but it was only today I had a chance to try it out with both a Nikon 70-200 f/2.8 and 80-400 f/4.5-5.6. At this point I should say that until recently I used both these lenses very successfully with a D90 and still do with my D700. Images are crystal sharp with the D700 and the same lenses today, so we can rule out the lenses.

With the D7000 using the above longer lenses the focus is very soft with the 70-200 and much more so with the 80-400. The weather today was a glorious with superb visibilty, absolutely clear winters day with bright sun, but the images I took were truly unacceptable. I have never, until today, adjusted the Auto Focus fine tune on any of my cameras never needing to. However, failing light with the camera at 1000 ISO 1/60 @ f2.8 I put on the 70-200 and at a +8 fine tune it was better, at +16 better again. I don't think I should have to do this. What is your advice or am I doing something fundamentally wrong? In any event what is the difference between the auto tune - and +, is it front or rear focus, or is it a sensor adjustment? Sorry to appear dim, but I've never had this problem before and wondering if I should return the camera.

Two images are attached, details on the image both taken with Matrix metering and hand held.

Your thoughts would be appreciated.

Thanks

Richard







Click on image to view larger version



Click on image to view larger version



Attachment#1 (jpg file)
Attachment#2 (jpg file)

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