So, I've just purchased the Streaklight 360 Ws for canon which I can trigger with a R2 Integrated Wireless system ( I trigger the flash with a transmitter that came with it ).
It works perfectly, but the thing is that I also have a Canon Speedlite 580EX II which I would like to use along with the Streaklight 360.
I figured I could just trigger it optically with the flash from the Streaklight 360, but it seems it won't respond to the flash. It works perfectly with the build-in popup flash on the camera.
So my question is, why won't the Canon Speedlite 580EX II trigger optically with the flash from the Streaklight 360 Ws? Am I missing something?