This optical slave is packaged in a convenient hotshoe that will accept the proprietary, non-ISO hotshoe found on some Sony and Minolta flash units. Please look closely at the images shown.
This device will immediately fire a connected flash unit when another flash burst is detected. This allows a remote flash to be fired without any connecting wires.
The triggering flash must not emit a pre-flash as this will prematurely fire the connected flash.
It requires no batteries or other power; it runs off the flash unit to which it is connected.
Disclaimer: This optical slave will NOT function properly with the following Sigma flashes: Sigma 530 DG Super, Sigma 530 DG ST, Sigma 500 DG Super, Sigma 500 DG ST.
Disclaimer: This optical slave will NOT fit the Sony HVL-F32X flash.
Price: $16.00 + shipping