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Old September 26th, 2003, 11:20 AM   #1
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Focus hunting on Auto Mode

I set-up my camera on a tripod in my office on auto mode in HD and I noticed that the focus keeps shifting even though The subject, me, does not move significantly, has anyone else noticed this? I will post a clip from the video tonight..
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Old September 26th, 2003, 11:23 AM   #2
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That's why after letting thecamera AF -- you turn-off AF.
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Old September 27th, 2003, 05:32 AM   #3
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Roy, where will you be posting the clip?
And Steve, does it shift like that in all lighting conditions or just if it's in low light?
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Old September 27th, 2003, 12:01 PM   #4
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AF uses scene contrast -- usually in the center of the frame.

Small changes in objects or lighting cause it to re-evaluate the focus. Hence hunting. This tends to hppen more in low light.


I don't think it's a good idea to leave AF on once you have got your focus.
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Old September 27th, 2003, 02:06 PM   #5
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Steve's got a point here. I totally agree, if ever you want to use AF, on a still shot that is, once it is done, de-activate it.
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