On Fri, 12 Apr 2002 14:20:53 +0200
Sylwester Pietrzyk <[EMAIL PROTECTED]> wrote:


> Can you tell how does P-TTL work in praktice?

sure, the flash fires a pre flash to gain information about the
subjects distance, brightness, back lighting for the  meter sensor.
This information is returned to the flash to correctly measure the 
strength of the flash.

Kevin
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