I want to use my Speedlite flash as my main flash off-camera and fire it remotely (with cactus V2 triggers) but I find it really annoying when the camera just goes to sleep and I have to walk over and wake it up again.

Is there any way to disable this power save feature?


1 Answer 1


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:

  1. Press the "C.Fn" button for 2 sec. or more so that "C.Fn" is displayed on screen.
  2. Select the Custom Function No.
    • Press the + button to select the Custom Function number ("01").
  3. 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.
  • \$\begingroup\$ This also applies to the Speedlight 580 EXII - see pages 10 and 27 of the manual. If you take the batteries out for more than one minute you will need to repeat this procedure. \$\endgroup\$
    – devstopfix
    Commented Aug 26, 2014 at 7:37

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