Quote:
Originally Posted by Lello
Sassan
Can you explain TTL, in layman's term?
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Very similar to the TTL (Through the lens) sensor for general light measurement, the newer cameras have TTL capability for flash light measurement. So either the flash out put is measured that way on auto TTL mode or that pre flash, flash could help in this kind of measurement apart from probable focusing assistant as the case may be. So if your external flash is a dedicated, TTL one, a TTL cable (The hot shoe has several pins instead of only one single central pin for manual ones), it still can exhibit that pre shutter release flash, therefore firing and discharging all other remote flashes on the slave.