A slave sensor or trigger is attached directly to a remote flash, usually via
the PC connection. A photocell in the slave detects the flash from any other
flash unit in the room and the slave circuit closes the trigger on the flash to
which it is attached. The slaved flash thus needs no connection to any other
unit.
Slaved flashes work well but one must be very careful about connections and
placement (line of sight) for reliable operation.
Gary Edwards
"Kinkead, Frank W" wrote:
> Rand, I'm still not quite clear on using a "slave sensor". I'm feeling
> pretty junior in knowledge compared to most of our group. Having never used
> a slave, how does this third flash in the rear of the room fire from the
> sensor ? (detect other flashes and goes off, Ir signal, etc.) From what
> I'm reading, this flash is not connected to the camera or other flashes at
> all.
>
.
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