Question about Canon Speedlite 580EX II (1946B002)
I believe you are referring to the pre flash for the ETTL function. both flashes happen so so fast that it looks like one flash. If your pictures seem dark make sure your flash is set to ETTL (press the MODE button unlit ETTL is displayed) this way the flash output is automatic. If it is still too dark you can change the flash output by adjusting the FEL (flash exposure composition) by pressing the button in the center of the dial until +/- is displayed the turn the wheel to select a + exposure (you can adjust this in 1/3 stop increments) then press the center button again. This can be found on pg 14 of the manual
Hope this helps.
Posted on Jun 18, 2011
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Posted on Jan 02, 2017
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