580EX II Speedlite : How to turn the Speedlite flash on and off.

Article ID: ART121048 | Date published: 05/12/2015 | Date last updated: 08/17/2015


How to turn the Speedlite flash on and off.


Set the power switch to <ON>, the flash recycling starts.
Check that the flash is ready
  • The pilot lamp will first turn green (ready for Quick Flash), the red (flash ready).
  • Pressing the pilot lamp will fire a test flash.


Quick flash enables a flash to be fired before flash-ready, when the pilot lamp is still green

Although the Guide Number (Gn) will be 1/6 to 1/2 that of the full output, Quick Flash is effective for nearby subjects and when you want a shorter recycle time

Set the drive mode to single shooting. Quick Flash cannot be used in the continuous shooting, FEB, manual flash and stroboscopic flash modes.

C.Fn - Quick Flash can also be used during continuous flash shooting - C.Fn 06


To save battery power, the power will turn off automatically after a certain period (approx. 1.5min. to 15min.) of ideal time. To turn on the Speedlite again, press the camera's shutter button halfway. Or press the Speedlite's test firing button.

C.Fn - Auto Power Off can also be disabled - C.Fn 01



Rate this Article
Was this article helpful?
Yes, This document is helpful
No, This document needs a clearer explanation
Please provide your comments