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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That's why after letting thecamera AF -- you turn-off AF.
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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? |
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. |
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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