DVD-Software.info

[k-man]

Hi:

Anyone know how the Nikon SB-800, SB-600, D70s, D200, etc. "talk" to
each other? It's not via RF and I was told it's not via IR. Someone
told me that it's not IR but that the speedlights are "optically"
driven. Technically, IR is optical since it's light. So, I don't know
what "optically" driven means. Anybody know the mechanism? I couldn't
find it in the manual.

Thanks.
Kevin

[Romeo Raabe]

My understanding is (ok, that should be enough disclosure) that they
work by light output as read by the iTTL sensor in the camera. Once
enough light (from all flashes - I have 2 600's slaving off one 800 on
camera) reaches the "film plane" or sensor, the rest of the flash is
stopped (time wise).