Los míos no son Cactus, pero son practicamente iguales, supongo que será la marca. Yo compré unos que se ponían que eran una nueva versión para que funcionansen bien con los flashes de canon 430EX (el que yo tengo) y 580EX, pero vamos, que con que sean V2, es igual.
Efectivamente, esos flashes no tienen donde conectar el cable, tienes que comprar una zapata (es barata) para poner entre el flash y el receptor. Esta zapata si lleva conector para el cable sincro pc. Yo de momento no compré la zapata esa (más que nada porque me olvidé...
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Estos son los que yo me he comprado:
http://img235.imageshack.us/img235/6418/triggersbf6.jpgWireless Flash Trigger RF-04 TM (Newest Version)
4 channels selectable;
Work with V2 wireless receivers only;
Power Input of Transmitter: L1028 12V 23A small battery (included for testing purpose only);
Power Input of Receiver: CR2 3V Alkaline battery (included for testing purpose only);
Maximum effective area: 30m (open area without interference);
One PC sync cable is included;
Receiver comes with PC sync port;
Radio working frequency: 433MHz
This is a newest version of the renowned wireless flash trigger that has been improved over the old version. The new version eliminate the misfiring problem of the previous version, particularly occurs to Canon SpeedLite 580EX and 430EX. The overall performance is more reliable as well.
This newest version runs on different channels, it can only work with new receivers and not suitable for the old version.
Buyer will receive:
1 x Newest RF-04 TM Version Transmitter
1 x Newest PT-04 Receiver
P.S This trigger set works with almost all flashes available on market except Olympus FL-36 which requires a receiver with higher triggering voltage.