Flash Mode- Ttl Autoflash; Fec: Flash Exposure Compensation; High-Speed Sync; Flash Mode-M: Manual Flash - Godox WITSTRO AD400Pro Quick Start Manual

Flash Mode — TTL Autoflash
This flash has three flash modes: TTL, Manual (M), and Multi (Stroboscopic). In TTL mode, the camera and the
flash will work together to calculate the correct exposure for the subject and the background.
* Press <MODE> Mode Selection Button and three flash modes will display on the LCD panel one by one with each
pressing.
TTL Mode
Press <MODE > Mode Selection Button to enter TTL mode. The LCD panel will display <TTL> .

FEC: Flash Exposure Compensation

With FEC function, this flash can adjust from -3 to +3 in 1/3rd stops. It is useful in situations where minor adjusting
of the TTL system is needed based on the environment.
Setting FEC:
1
CH
MODE GR/CH
A
MENU
10
%
1 2
Press <SET> Button and Set the flash exposure compensation
flash exposure compensation amount.
amount will be highlighted on
● Turn the Select Dial to set the
the LCD panel.
amount.
● "0.3"means 1/3 step, "0.7"means 2/3
step.
● To cancel the flash exposure
compensation, set the amount to
"+0".

High-Speed Sync

High Speed Sync (FP flash) enables the flash to synchronize with all camera shutter speeds. This is convenient
when you want to use aperture priority for fill-flash portraits.
1
CH
MODE GR/CH
A
MENU
10
%
1 2
Press High Speed Sync Button Please use XPro or X1 series
transmitter.
so that < > is displayed.
● If you set a shutter speed that is the same as or slower than the camera's maximum flash sync speed, <
will not be displayed in the viewfinder.
● With high-speed sync, the faster the shutter speed, the shorter the effective flash range.
● To return to normal flash, press < > button again. Then <
● Multi flash mode cannot be set in high-speed sync mode.
● Over-temperature protection may be activated after 50 consecutive high-speed sync flashes.
TTL
MENU
MODE
+0.3
MENU
10
%
10
3
%
Press < SET > button again
to confirm the setting.
TTL
+0.3
10
%
> will disappear.
- 33 -
Flash Mode — M: Manual Flash
The flash output is adjustable from 1/1 full power to 1/256th power in 0.1 stop increments. To obtain a correct flash
exposure, use a hand-held flash meter to determine the required flash output.
MODE GR/CH
MENU
10
%
1
Press < MODE > button so
that < M > is displayed.
GR/CH
In M manual flash mode, press <MENU> button to enter C.Fn-SLAVE to choose S1 function, so that this flash can
function as an optical S1 secondary flash with optic sensor. With this function, the flash will fire synchronously when
the main flash fires, the same effect as that by the use of radio triggers. This helps create multiple lighting effects.
Press < MENU > button to enter C.Fn-SLAVE to choose S2 function, so that this flash can also function as an
optical S2 secondary flash with optical sensor in M manual flash mode. This is useful when cameras have pre-flash
function. With this function, the flash will ignore a single "preflash" from the main flash and will only fire in response
to the second, actual flash from the main unit.
● S1 and S2 optical triggering is only available in M manual flash mode.
>
M
1 MENU
CH
A
256
1/ +0.1
10
%
2 3
Turn the Select Dial to choose a
desired flash output amount.
Optical S1 Secondary Unit Setting
Optical S2 Secondary Unit Setting
- 34 -
MODE GR/CH
MENU
10
%
Press < SET > button again
to confirm the setting.