> Date: Fri, 04 May 2001 09:07:33 +0100
> From: James McCauley <[EMAIL PROTECTED]>
> Subject: Re: EOS ETTL and Metering mode.
>
> Forgive me if I'm missing something obvious, but
> if it's accepted that there is a formula for
> producing a correct flash exposure (e.g. ISO rating
> + subject distance = X amount of light for correct
> exposure) couldn't the flash calculation simply be
> linked to the lens' focus distance so that whatever
> you focus on is correctly exposed, rather than relying
> on the amount of light coming back into the lens.
You are not missing something obvious, it is Canon
to have missed this obvious thing. Considering that
all EF lenses feed back distance info (you can check
that by looking at the EXIF data), it is really
dumb beyond cure not to use this info.
--
Michael Quack <[EMAIL PROTECTED]>
http://www.photoquack.de
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