This Sonia Extended Range version has approximately 25% increased range over the standard Sonia optical slave (yellow end cap).
This optical slave has the proprietary Vivatar connector and pushes directly into the sync port on the Vivitar 285HV, 285 and 283* flash units. It also works with the Minolta 360PX and 320X flash units.
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 it is connected to.
*When this optical slave is used on the Vivitar 283 the slave blocks the port where an external high voltage power supply is plugged in.
It is small, about ½ x ¾ x 1 inches. The slave and circuitry is encased in solid resin, so it is extremely rugged.
Price: $12.00 + shipping