22When autofocus cannot achieve focus on the subject in low-lightconditions, the AF-assist beam activates automatically.When autofocus cannot achieve focus on the subject in low-lightconditions while taking pictures using the viewfinder, pressing theshutter button halfway fires the flash continuously to assist autofocus.The flash also fires continuously under the same conditions when AFmode is set to [Quick mode] during Live View shooting or movieshooting. The effective range is approximately 4 m / 13.1 ft.This function only works when used with an EOS digital camera with anexternal Speedlite control function. Depending on the camera model,the firmware of the camera may need to be updated.The LED light can be used as the AF-assist beam when the AF mode isset to [Live mode] or [uLive mode] during Live View shooting ormovie shooting. The effective range is approximately 4 m / 13.1 ft. (Withf/1.8 lens at ISO 3200)Manual lightSet the LED light switch to <M> and press the <LED LIGHT> buttonuntil the LED light turns on.The LED light will turn off after about 60 minutes of idle use.To turn off the LED light, press the <LED LIGHT> button until the LEDlight turns off.AF-assist BeamAF-assist Beam Using Continuous FlashesAF-assist Beam Using the LED LightLED light switchManual light buttonManual light Auto lightThe Speedlite does not fire when the LED light is turned on.