> Greg Lynch wrote:
> >I've never ever on ANY camera
> >had the viewfinder show me what's in and out of focus without using DOF
> >Preview. Unless the whole image is out of focus. Part of the viewfinder
> >image in focus, and the rest out of focus (like when the autofocus fails)
> >is something totally foreign to me. What am I missing????
>
> To slightly restate Paul's original observation, he was saying that at the
> *widest possible aperture* for a given lens (for example, f/1.4 on the
50mm
> f/1.4 lens), there should be no need to depress the DOF preview button to
> see what would or would not be in focus at that aperture setting. This is
> because the DOF preview button works by stopping down the lens to the
> desired aperture, but, if the lens will be used wide open, there is no
> stopping down to be done.
>
<snip>
Ah, apologies to all--I'll answer my own question: what I missed was the
"widest possible aperture". It definitely should throw the background out
of focus. Wierd problem Paul has, it seems, and I don't have an answer to
that one.
Greg Lynch
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