How do I get better Autofocus?

Started Nov 15, 2012 | Discussions thread
tedolf Forum Pro • Posts: 23,964
Well, you are shooting.....

saywhathomie wrote:

Russ Houston wrote:

tedolf wrote:

Don't use auto focus. If you are shooting a scene with a known depth of field. Disable AF and use a fixed aperture sufficiently small to make the entire scene within the selected DOF. You might need to use lights if you need a small aperture.


Yep, autofocus on video is a pain. Better to just focus once, then switch to manual and leave it there. Especially if you're doing review videos, the camera won't need AF anyway.

Okay, just tried that and it didn't work. I can't bring the product up close or far away without it being blurry.

I'm shooting at 3200 ISO and f.25.

wide open so of course you are going to get the minimum Depht of Field.  Stop down to f/8.0, manually focus on something about two feet from the lens and everything from 1.5  feet  out to about four feet will be in focus.

You may need to turn on some lights to get adeequate exposure.

Do you understand the relationship between aperture and Depth of Field?


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