... , 580EX II , 580EX ... ... RT — INITIAL WIRELESS OPTICAL FLASH SETUP Press the Wireless Flash Button until ... The wireless flash button cycle ... Press the Wireless Flash Button until ... ... Speedlite 580EX II , 580EX ... , 430EX II , 430EX ... or 270EX II . ... manual for optical wireless flash setup instructions ... ... using Canon optical wireless setups nearby, ... c ) The channel ... c ) The channel ... WIRELESS E-TTL ... ... , B or C . (Groups ... available in optical wireless mode.) ... A:B C >. ( ...
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