I wonder:
If the A-TTL sensor reads from the surface of the film, how could it read
the pre flash? Moreover, how come the pre flash is fired only when the flash
is directed towards the subject to calculate the distance, when this
information can be fed by the lens (sort of Nikon's D-TTL)?
=======================
The A-TTL pre-flash is read by the flash sensor. Many have speculated that Canon does
not use lens distance information because of patent considerations.
--
Dave Herzstein
[EMAIL PROTECTED]
http://www.kjsl.com/~dave
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