Trigger a Canon Speedlite 580EX2 from compacts
How can I trigger a Canon Speedlite 580EX2 from my compact Canon cameras. I have an old Powershot G5 and a newer Powershot SD300. I can do this with my Nikon Speedlite SB-800 by setting the Wireless Flash Mode to SU-4. I cannot figure out how to do it with the 580EX2. Any help on this would be appreciated.