Fv Lock (Nikon); Advanced Options Setting - Yongnuo YN568EX Instructions Manual

7. FV Lock (Nikon)

Set the AE-L/AF-L function as FV Lock on the camera before using this function. At this time, you can aim at
your desired object in the viewfinder and then press the AE-L key or AF-L key, in such case, the flash light will
pre-flash to get the reading of flash exposure for the object; after you have confirmed the scene frame, press the
shutter. (This function can only be available when your camera supports it; for the setting of AE-L and AF-L, refer
to your camera manual).

8. Advanced Options Setting

YN568EX has advanced options function, you can customize speedlite function as you need, set advanced options
with button group of the speedlite or camera menu access. Setting method of the buttons of the speedlite: Keep
[Backlight/voice switch] for a long time and operate [MODE] to enter into the setting state of advanced options
function, and the LCD screen shall show set items；such as: <SE oF 3> means the application at the roof, the
speedlite shall automatically sleep if it is idle for 3 minutes, and automatically power off if it is idle for another 3
minutes after sleep.
Advanced options function supported by YN568EX is as following:
Fn NO.: 01
SL EP on： Auto power off is enabled
SP EP﹣﹣：Auto power off is disabled