Canon Speedlite 580EX Speedlite 580EX Manual - Page 38
Master, Unit's, Flash, ON/OFF, Press, <ZOOMI, button, display, blinks, shown, Disable, master,
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LXl ~ The Speedlife's zoom set[ingwill 6e set automatically to 2hmm . ]t is possible to change the ma8t(:r unit's zoom setting . Wov:EVer, npte that the master unit transmits v+ireless signals to [die slave unit(s) with :he preflash . Therefore, the flash coverage must coverthe slave units position . If you change [he master units room setting, be sure to test the wireless oppraiion before shouting . u IFthe slave unit enters auto power off. it can 6e turned on again t~v; pressing the master unit's test firing button . * A test flash candor 5o fired while the camera's operation simer 64 or 66 is active. Master Unit's Flash ON/OFF You can disable the master unit from firing during actual exposure so that only the slave unit(s) will fire in the final picture. rE771 D Zoom,~'imm ~ -ori- -~ ~i i ` Press the thierorn0wi>ll butEon blink . . ETTL IM Zoom L'imm .-i .-- L~1 Even if you disable the master units flash firing, it will still fire a preffash to transmit vrirelpss signals . 36