Owner`s manual
Ratio Mode
FlexTT5 Zone A
FlexTT5 Zone B
Ratio Wireless E-TTL II: MiniTT1 OO FlexTT5
Flash on Camera
This mode uses Canon’s Wireless Flash Ratio with E-TTL II
system. Place remote ashes into different slave groups and
control the balance of light among the groups or zones.
O
Please read your Canon manuals for more information
  on Flash Ratio with E-TTL II and how to control groups from
  the master ash.
1. Slide the MiniTT1 Transmitter onto the camera and
  tighten the locking ring.
2.  Slide a Canon Speedlite (set for <MASTER>) onto the
  MiniTT1 and secure its locking shoe. Enable slave groups
  in the master Speedlite per ash manual instructions.
3. Set the remote FlexTT5 radios to the desired slave
  group (A, B, C) by using the Zone Switch on the side.
  Note that PocketWizard Zones are used instead of 
  Canon slave groups.
4. Slide the remote Speedlite onto a FlexTT5, tighten the
  locking ring, and secure the FlexTT5. Repeat for each
  remote Speedlite. The remote Speedlites should be set
  to normal ETTL mode, not <MASTER> or <SLAVE>. 
  The slave group is set by the Zone Switch and not in the
  remote ash. All remote E-TTL II ashes on the same Zone
  will be treated as one zone of light.
5.  Adjust ratios using the master Speedlite’s ash controls.
6. Trigger normally
You may use Canon’s Speedlite Transmitter, the ST-E2, instead
of a 580EX to control ratios.
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