PowerTracking
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• As you adjust your camera’s ISO and aperture, flash power output will automatically track to maintain the current
exposure level.
To change the values used for the center point, turn off your transmitter then turn it back on and follow these steps
again. See the PowerTracking Tab in the PocketWizard Utility section below for more information.
IMPORTANT NOTE: Shooting in Shutter Priority/Tv, Program, Full Auto, or shooting quickly or making rapid
exposure changes is not recommended. The flash values may change rapidly and your remote flash may not be able
to keep up. Honor your flash’s ready wait time or “dump” as necessary.
Flash Exposure Compensation (FEC) can be set in many places and all values are added together.
FEC can be set:
• On the Power Dials of the AC3 ZoneController
• On the camera for all zones except AC3 Manual zones
• For transmitting radios, the PocketWizard Utility can adjust the PowerTracking center point for ISO and aperture
which affects all zones
• For a PowerMC2, PowerST4, or AC9 AlienBees Adapter connected to a FlexTT5, the PocketWizard Utility can
adjust FEC for the directly connected flash on the PowerTracking tab
If the combined FEC settings are more or less than your flash’s capabilities, then the flash will operate at maximum
or minimum output accordingly.
Using an AC3 ZoneController
An AC3 ZoneController on your transmitting ControlTL radio allows you to adjust the remote flash output power for
up to 3 zones independently, in either Manual or Automatic modes.
Set the Zone on your receiving ControlTL radio to Zone A, B, or C as desired.
Manual Mode: With an AC3 Zone Switch set to M (Manual), the AC3 Power Dial for that zone sets the absolute
flash power output as shown in the table for Basic Power Control. Your camera’s FEC/EC, ISO, and aperture
controls will not affect the flash output power levels for AC3 zones set to M.
Automatic Mode: With an AC3 Zone Switch set to A (Automatic), Automatic PowerTracking using Center on ISO
& Aperture with First Shot is engaged. See the Automatic PowerTracking section for more information. The AC3
Power Dial for a zone sets the flash power output level for that zone relative to the ControlTL center point. Your
camera’s FEC control can be used to adjust flash output power level for all zones set to A (Auto).
Off: With an AC3 Zone Switch set to Ø (Off), flashes in that zone will not trigger.