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| p.1 #5 · Aputure Trigmaster II with Canon 580EX ii speedlite ? |
If you want to remotely control a speedlite via the camera external flash menu you will have to invest in one of the ETTL capable trigger systems; Yongnuo YN-622, Pixel Knight, Phottix, Pocket Wizard ControlTL, Radio Poppers, etc.
They vary in price and capabilities. Or as mentioned use the Canon RT capabilities in the 600EX-RT. The full advantage of the RT requires 2012 camera. If you just want radio to replace the optical triggering then pre-2012 cameras also will work.