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..

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

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.