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Wireless TTL Slave Operation | 23
WIRELESS TLL SLAVE OPERATION
The ProMaster FL1 is equipped with advanced wireless TTL flash feature, so that it can be used off
camera while still maintaining full TTL control. Take a moment to familiarize yourself with the following
terms in order to understand how to work with multiple wireless TTL flash units:
Master
Remote or
Slave Flash
Channel
This can be the camera’s built-in flash, a flash mounted on the camera, or a dedicated
wireless controller. Only one master flash is allowed in a wireless multiple flash photogra-
phy setting. It controls how the slave flashes operate in wireless TTL mode.
Flash units that are not directly connected to the camera, and are controlled by a master
flash or controller are called “slave” or “remote” units. There is no limitation on the number
of remote units that can be used at one time.
Master and Slave units exchange data through channels. Four channels (1, 2, 3, 4) are
available in the flash. You can pick the channel you prefer for communication between the
master and remote flash units. You can use this option to prevent your remote flash units
from being triggered by the master unit of another photographer working with the system
nearby.
Group You can assign remote flash units to one of the three groups (A, B, or C) and set the
mode and output power level of each group.