Just replied Gerard. I suggested using a Vivitar 285HV flash instead of the 
Canon. This way there is one flash. 

----- Original Message ----
From: Gerard Maas <[EMAIL PROTECTED]>
To: [email protected]
Sent: Wednesday, July 4, 2007 2:20:25 PM
Subject: Re: EOS ETTL Flash Eye Allergy? Ans: Change to A-TTL

On 7/4/07, Don Weiss <[EMAIL PROTECTED]> wrote:
> <<Peter K replied to Gerard Maas:>>
>
> I've seen that in a few people, so I take several shots in succession of the
> same image. This way there will be some with and some without eyelids shut.
> If this is consistent and her eyes are always closed even with multiple
> images taken, on a Canon 550EX or 580EX you can set change E-TTL to A-TTL,
> the previous method Canon used for flash exposure. This will only use one
> flash (no pre-flash) and it is just as accurate in portraiture.
>
> <<--------------------------------------->>
>
> If Gerard is using a Digital SLR, A-TTL isn't available.  It's an
> Off-the-film technique, and doesn't work with digital sensors.  Come to
> think of it, A-TTL emits a pre-flash anyway.
>
> Pure TTL would work, but only with film bodies because it too is an O.T.F.
> technique.
>
> So the only options are fully manual flash, or as Adam Baker suggested, FEL.
> But that requires you to explain to the subjects(s) that the first flash
> they see is only for "exposure setting purposes."
>
> Some of the older Canon Speedlites may have self-contained exposure setting
> (like the classic Vivitar 283); not relying on the camera, except perhaps
> for film speed and aperture information.  But none of the newer ones, such
> as the EX series, have this.

I'm indeed using digital, and to make things more complex, most of the
time I use wireless E-TTL with multiple flashes which rules out using
FEL altogether.

It seems that manual flash is the only way. I also observed in the
images that when ambient light levels where higher, the eye-blinking
was reduced.

Are there any other alternatives?

-greetz, Gerard.






       
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