User Manual

Wireless Flash Shooting: Optical slave mode(S1/S2)
Short press the [ ] button unit [S1] or [S2] icon is display.
modes are also suitable for off-camera slave unit, for create a variety of
lighting effects, which is suitable for manual flash and TTL flash
environment. The two modes are same as M mode when adjusting the flash
output. When using the S1\S2 mode, you can rotate the flash head to make
the sensors face to the master unit.
S1 mode: In this mode it will work with the first flash synchronously of the
master flash, with the result consistent with the use of radio slave. To use
this
mode properly, the master flash should be set at manual flash and the TTL
flash system with preflight function and the red-reduction function with
multiple flashes should not be used.
S2 mode: It is also called "pre-flash cancel mode". This mode is similar with
S1 mode, but it can neglect the pre-flash given by TTL flash. Therefore, it
can support the master flash working in TTL mode. In particular, if S1 mode
cannot flash properly and synchronically with your internal flash, you can
try to use S2 mode.
The two
outdoor
indoor
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