On 11-02-07 1:12 PM, Larry Colen wrote:
I'm going through my dance portraits from Saturday night, and I'm finding a lot
where the K20 missed focus. I was mostly shooting with the 16-50 on the K20, at
about f/6.3. I could have cranked the strobe up higher, but I didn't want my
home depot backdrop to also be in perfect focus. There was one batch where the
back of the leader's sweater was in focus, but the dancers faces were just
slightly soft. I don't know if this was mis focused on the sweater, or just a
blown focus where DoF still caught the sweater, because there are others where
everything is sharp.
I've got a bunch more that are simply blown focus. It could simply be pilot
error because when people are dancing I lock focus, and hit the focus lock so
that the shutter will activate when I press it. I'm afraid that I don't trust
the responsiveness of the autofocus, and may be screwing myself up there. I
expect that the problem is a team effort between the camera and myself,
exacerbated by my not trusting because the focus is slow and perhaps a bit
unreliable.
Or, as a wise man once said, "Aaarrgggh".
Have you gone through the focus calibration with this lens?
Have you tried AF-C?
With moving objects I'd never try to use focus lock, myself. I'd just
turn off AF altogether.
-bmw
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