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Forums Lobby GET TO KNOW YOUR CAMERA & MASTER IT Nikon D7100, D7000 (Public) topic #23577
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Subject: "RE: What to do? Bad lens? Bad D7000 body?" Previous topic | Next topic
gfinlayson Silver Member Nikonian since 24th Jan 2011Thu 31-Jan-13 09:45 PM
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#13. "RE: What to do? Bad lens? Bad D7000 body?"
In response to In response to 11
Thu 31-Jan-13 09:59 PM by gfinlayson

Maidenhead, GB
          

Focusing on a subject's eye is a much easier target for the AF system as it usually presents a high contrast area - the centre of the eye is normally much darker than the surrounding skin and in any case has a dark centre surrounded by white. Your banana was a low contrast target and with lighting levels that require ISO 1000 and f/1.4, there is very little contrast variation for the AF system to detect.

I've shot portraits with my 50mm at f/1.4 - f/2.0 and got the eyes bang in focus very easily. Depth of field is so shallow at these settings, that the ears and nose are out of focus, but the 50mm f/1.4 has always got the eyes tack sharp.

For proper AF fine tuning, you need to optimise the focusing conditions for the lens - that means using good light and a high contrast target.

Your banana was shot in low light and was a low contrast target.

  

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This is a hot, active topic!What to do? Bad lens? Bad D7000 body? [View all] , Omaha , Thu 31-Jan-13 02:31 AM
 
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jbloom Gold Member
31st Jan 2013
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RLDubbya Silver Member
31st Jan 2013
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Gamecocks Silver Member
31st Jan 2013
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31st Jan 2013
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aolander Silver Member
31st Jan 2013
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Rassie Silver Member
31st Jan 2013
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gfinlayson Silver Member
31st Jan 2013
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km6xz Moderator
31st Jan 2013
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J_Harris Silver Member
31st Jan 2013
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Omaha
31st Jan 2013
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agitater Gold Member
31st Jan 2013
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Omaha
31st Jan 2013
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gfinlayson Silver Member
31st Jan 2013
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31st Jan 2013
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31st Jan 2013
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31st Jan 2013
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31st Jan 2013
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31st Jan 2013
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gfinlayson Silver Member
31st Jan 2013
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cwils02 Gold Member
06th Feb 2013
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ericbowles Moderator
02nd Feb 2013
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Ellis Feibush Silver Member
03rd Feb 2013
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Matthew Gregory Silver Member
04th Feb 2013
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04th Feb 2013
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