Asfaik, the commonest type is the one triggered by the light of the main
flashes. They are cheapish too. They can be with PC or mini-jack plug-in.
(look like bulbs with a plug-in) The con of these is that anyother
photographer may trigger your flash (in a wedding f.i.). Then radio slaves
have been developed. besides this, there are other systems (IR?) for
instance in Broncolor system with the meter you can trigger flashes without
cables. Many (most?) big studio flashes have a flash light sensor built-in.
The most sophisticated systems allow OTF TTL control of remote flashes too.
I believe they are radio-controlled only.
Marco
----------
>Da: "Kinkead, Frank W" <Frank.Kinkead@xxxxxxxxxxxxx>
>A: olympus@xxxxxxxxxxxxxxx
>Oggetto: [OM] "Slave Sensor" Flash
>Data: Dom, 28 mar 1999 9:30
>
> 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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