Q: Manual Flash - Canon SPEEDLITE 580EXII Mode D'emploi

q: Manual Flash

You can set the flash output from 1/128 power to 1/1 full power in 1/3-
stop increments.
Use a hand-held flash meter to determine the required flash output to
obtain a correct flash exposure.
Flash Output Display
When you change the flash output during shooting, the table below
makes it easier to see how the stop changes such as 1/2 -0.3 → 1/2 →
1/2 +0.3. You can see how the stop changes when you increase or
decrease the flash output.
For example, when you decrease the flash output to 1/2, 1/2 -0.3, or 1/2
-0.7, and then increase the flash output to more than 1/2, 1/2 +0.3, 1/2
+0.7, and 1/1 will be displayed.
(Example)
1/1 -0.3
1/1
1/2 +0.7
22
Press the <D> button so
1
that <q> is displayed.
Set the flash output.
2
Figures for decreased flash output →
1/1 -0.7
1/2 +0.3
← Figures for increased flash output
Press the <8> button.
The flash output blinks.
Turn the <9> dial to set the flash
output, then press the <8> button.
Press the shutter button halfway to
see the effective flash range
displayed.
1/2 -0.3
1/2
1/4 +0.7
1/2 -0.7
1/4
1/4 +0.3
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