Power Management; Flash Mode-Ttl Autoflash - Godox TT685II-S User Manual

Power Management

Use ON/OFF Power Switch to power the flash unit on or off. Turn off it will not be used
for an extended period of time. Setting as transmitter flash, it will turn the power off
automatically after a certain period (approx. 90 seconds) od idle use. Pressing the
camera shutter halfway or pressing any flash button will wake up the flash unit. Setting
as a receiver flash, it will enter sleep mode after a certain period (adjustable, 60 minutes
by default) od idle use. Pressing any flash button will wake it up.
Disabling Auto Power Off function is recommended when the flash is used off
camera. (C.Fn-STBY)
Receiver Auto Power Off Timer is set to 60 minutes by default. Another option "30
minutes" is available (C.Fn-RX STBY)
Flash Mode—TTL Autoflash
This flash has three flash modes: E-TTL, Manual (M) and Multi (Stroboscopic). In E-TTL
mode, the camera and the flash will work together to calculate the correct exposure for
the subject and the background. In this mode, multiple TTL function are available: FEC,
HSS, second curtain sync, control with Sony camera's menu screen.
* Press <MODE> Mode Selection Button and three flash modes will display on the LCD
panel one by one with each pressing.
ETTL Mode
Press <MODE> Mode Selection Button to enter E-TTL mode. The LCD panel will display.
Press the camera release button halfway to focus. The aperture and effective
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flash range will be displayed in the viewfinder.
When the shutter button is fully pressed, the flash will fire pre-flash that the
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camera will use to calculate exposure and flash output the instant before the
photo is taken.
FEC: Flash Exposure Compensation
With FEC function, this flash can adjust from -3 to +3 in 1/3 stops. It is useful in situations
where minor adjusting of the TTL system is needed based on the environment.
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