At 06:09 PM 1/3/2001 , you wrote:
> From what people have said and from calling
>Canon it seems that in AV and TV mode the flash is basically just a fill
>flash.
>On Nikons for example if you stick on a flash and set the camera
>to aperture priority you can use a smaller aperture then you could with
>out a flash.
Gary,
Commonsense says that when you have two light sources of different strengths, one of
them is going to be a main light and the other is going to be a fill, but there's no
rule that says: "FLASH MUST BE FILL-LIGHT" and "SUNLIGHT MUST BE MAIN".
So, yes, if you're using the flash outdoors under bright skies and the camera meter
says F16 @ 1/90, you can go ahead and stick on a flash and dial in F32 for the
aperture instead. At this point, you're asking your flash to output light that is
TWICE as bright as the sun, and at the short distances involved it can do it. But,
unless your subject completely fills the viewfinder, you're going to see the
background in your picture, and that background is going to be underexposed because
the sunlight falling on the background is only half as strong as the light on your
subject.
If that's what you wanted, great. If not, you need to play around with your subject
placement some more.
This is the same whether you use Canon, Nikon, or Acme.
--Roger
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