M: Manual Flash - Godox TT685II-S User Manual

Second-Curtain Sync
With a slow shutter speed, you can create a light train following the subject. The flash
fires right before the shutter closes.
Choose REAR flash mode in the settings of Sony camera.

M: Manual Flash

The flash output is adjustable from 1/1 full power to 1/256th power in 1/10th stop
increments. To obtain a correct flash exposure, use a hand-held flash meter to
determine the required flash output.
Press <MODE> button so
that <M> is displayed.
Optic S1 Secondary Unit Setting
In M manual flash mode, press <S1/S2> button so that this flash can function as an optic
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.
Optic S2 Secondary Unit Setting
Press <S1/S2> button so that this flash can also function as an optic S2 secondary flash
with optic 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 optic triggering is only available in M manual
Press <+/-> to choose
power, then turn the
Select Dial to choose a
desired flash output
amount.
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Press Set button again to
confirm the setting.