One YN568EX is able to respectively accept internal flashing of 580EX II, If you don’t have much time to read the whole user manual, we advise you to read
Вспышка YN-568EX может синхронизироваться с фотокамерами Canon на всех Вспышка YN568EX II имеет 2.5 мм PC-разъем для синхронизации с
Русский мануал на Yongnuo YN-568EX Canon. yongnuo-yn568ex-canon-manual-rus Обзор мануального синхронизатора Yongnuo YN 560-TX II.
One YN568EX is able to respectively accept internal flashing of 580EX II, flashing and ST-E2 wireless signal, achieves external TTL and manual flashing.
In the optical transportation wireless flash shooting, the YN568EX III can used as the YN585EX),supports 4 channels, realize wireless TTL, manual flash and II?YN568EX II?YN568EX III?600EX(II)-RT?580EX II?SB-910/900/800/700