TTL Compatibility Canon E-TTL II- ControlTL: PocketWizards newest firmware platform taps into the cameras digital communications to enable an entirely new level of remote flash capability through our proven radio system. ControlTL allows remote TTL for Canon E-TTL II systems as well as Manual Power Control. ControlTL firmware is configurable and upgradeable forfuture-proofcontinuous improvement. Find more details on ControlTL here.- Dedicated E-TTL II Triggering: Locking your MiniTTI Transmitter into the hot shoe of a Canon DSLR camera and mounting E-TTL II flashes onto FlexTT5 Transceivers gives you full autoflash exposure control with the freedom and reliability of a PocketWizard radio. There are no special settings to make or modes to call up. Use the camera. on-camera flash or flash commander controls for flash compensation. zone and ratio control.- Manual Power Control: Adjust the manual power settings of your remote Canon Speedlites directly from a 580EX II flash mounted on