On Mon, 22 Oct 2001, Icoz, Evrim wrote:
> I think that is how it should work. At least on my 550ex. You are supposed
> to set the ratio on the 550ex, and then fire away. But as I mention, this is
> from what I read since my camera does not support this. Why it does not
> support it (should be a function of the flash, not the camera) is probably a
> marketing thing by Canon.
No. What happens with E-TTL is that camera first shoots a pre-flash that
is measured, and after that it swings the mirror and takes the picture.
Now, in wireless E-TTL multi-flash situation the camera has to do the
pre-flash for all the flash groups (mas 3) individually before it swings
the mirror. So it really is a function of the camera. And that's why you
do get wireless E-TTL with EOS 50e (for instance), but only with one flash
group (i.e. no ratios).
Best regards,
Hugo.
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** Hugo G�vert **
** [EMAIL PROTECTED] http://www.hut.fi/~hugo **
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