--- "Icoz, Evrim" <[EMAIL PROTECTED]> wrote:
<snip>
> How does the ETTL work in manual focusing mode?
I *think* the camera will still use the matrix
exposure sensor slaved to the "selected focus point"
for E-TTL (usually the center one, UNLESS you have the
CF selected to slave the E-TTL matrix sensor the
active focus point; EOS flash guru Dave Herzstein
would probably know for sure).
The way to be sure about E-TTL flash exposure is to
place the E-TTL matrix sensor that is computing the
flash output over an 18% reflective part of your
subject use FEL, and then re-compose your shot.
The background exposure is a function of the AMBIENT
light... if it's located far behind your subject, the
flash isn't capable of lighting it, and it will fade
to black unless you've got Av mode set and have a
longer ambient exposure, which risks ghosting from
moving elements of the picture or camera shake.
Remember the inverse square law! THis is the great
tradeoff of flash photography.
MadMat
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