ETTL stupid question

Started Dec 14, 2012 | Discussions thread
Quantum Help
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Re: Syl Arena is your friend
In reply to Zee Char, Dec 17, 2012

Zee:

The FEL button on the back of the Canon cameras does a TTL pre-flash and records the exposure required, based on what the metering area set saw (evaluative, center weight or spot).  A lot of photographers meter the area they want, then recompose and shoot by depressing the trigger button.

It does help a little, because it reads what you want it to read, shoot what you want to shoot and since there is a delay between pre-flash and fire, may give you images without blinks.

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