--- Bob Sull <[EMAIL PROTECTED]> wrote:
> I was recently in an auto museum and took pictures
> of some of the cars. When I got my prints back there
> was a lot of glare from the museum lighting and
> maybe my flash.
>
> I used my EOS-3 and 550-EX.
>
> I think a cp filter might have taken care of the
> glare from the museum lights, and assuming the
> flash caused minimum glare, will the -3 and
> 550EX combo give me correct exposure with a cp on
> the lens?
>
> I have never used a cp with flash before and got
> thinking about this today.
Hi Bob,
I've never used flash with a cp INDOORS, but have many
time outdoors (with fill flash - great for colour
saturation), and the metering has been fine. Any
pre-flash (as well as the actual exposure) is read
through the lens/cp combo anyway, so the roughly 2
stop loss is taken into account.
The CP will help with some of the reflections from the
museums lighting, but remember that polarisers cut
reflected light from an angle. The light reflecting
back from your flash will be coming *directly* back to
you (not at an angle) so the cp will have little/no
effect on that.
The flash modelling function might be useful here -
you can see what the reflections will be and change
your position if need be.
The other effect that a cp will have indoors is to cut
the ambient lighting level by ~2 stops. Most museums
etc aren't overly brightly lit inside, so the result
could be black backgrounds (or at least very
underexposed backgrounds relative to the subject)
unless you also use a tripod to get longer shutter
speeds etc etc. You get what I mean.
Regards
Gary
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