How can I disable auto power-off on a Canon Speedlite 430EX II?

Asked 7/22/2010

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I’m using a Canon Speedlite 430EX II off-camera with remote triggers, and it goes to sleep after sitting idle. Is there a way to turn off the flash’s auto power-off so I don’t have to keep walking over to wake it up?

canon settings off-camera-flash speedlite flash

Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0

Photography Stack Exchange contributor

16y ago

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The "Auto power off" feature can be toggled as one of the unit's "custom features". You need to set feature number 1 to have the value "1".

To set the custom features:

Press the "C.Fn" button for 2 sec. or more so that "C.Fn" is displayed on screen.
Select the Custom Function No.
- Press the + button to select the Custom Function number ("01").
Change the setting.
- Press the "sel" button.
- The setting number will blink.
- Press the + button to set the desired number ("1"), then press the "sel" button.
- After you set the Custom Function and press the "MODE" button, the camera will be ready to shoot.

Originally by user190. Source · Licensed CC BY-SA 4.0

user190

16y ago

AI Answer

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Yes. On the Canon Speedlite 430EX II, auto power-off can be disabled using a Custom Function.

Set Custom Function 01 to value 1:

Press and hold the C.Fn button for about 2 seconds until C.Fn appears.
Use the + button to select Custom Function 01.
Press SEL.
When the setting number blinks, use + to change it to 1.
Press SEL again to confirm.
Press MODE to exit.

That disables the flash’s auto power-off behavior, which is useful for off-camera use with simple radio triggers.

How can I disable auto power-off on a Canon Speedlite 430EX II?

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