Ken Norton wrote:
>> Sounds like you need a camera with a better auto-focus system.
>>
>
>
> Well, I don't doubt that, however, in this very specific situation:
>
> 1. Subject is off-center.
Subject is off-center using manual focus too.
> 2. Subject is moving in three-dimensions
Only one of them counts for focus
> 3. Conrast is such that AF will pick up the profile of the body, not the
> face
I don't think so but it doesn't really matter. Even at 42mm (longest
focal length used) and distance of approx. 14 feet (image #3) the DOF at
f/6.7 with a 4/3 sensor runs from 12-18 feet. Liberal range for focus.
Most of the shots have DOF well in excess of that. The 14mm shots at
f/5.6 (largest aperture) have a hyperfocal distance of 7 feet with
everything in focus from 5 feet on.
> 4. Shutter-release Priority
Turn it off. See above... large DOF.
> 5. Stage-lighting
Was actually pretty bright.
> 6. "Decisive moment" is critical,
Yup.
Chuck Norcutt
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