Wired flash system – Canon Speedlite 420EX User Manual
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Wired Flash System
With wired flash system accessories, you can easily set up a TTL wired
autoflash system with any EOS camera.
Up to four Speedlites can be connected in a wired flash system. Any EOS-
dedicated EX-series, EZ-series, EG-series, and E-series Speedlite can be
Connection and Set-up
Use the necessary wired flash system accessories to connect the
Speedlites and take the picture after the pilot lamp lights.
^ Connecting Cord
OH-Camera Shoe Adapter OA-2
•f Off-Camera Shoe Adapter OA-2
TTL Hot Shoe Adapter 3
If the TTL Hot Shoe Adapter 3’s internal battery power is very low, the
Speedlite's flash-ready indicator will not light and no flash will be fired. Check
the TTL Hot Shoe Adapter 3's battery level before using it.
Do not extend the Connecting Cord length by more than 9 meters (three
300cm cords connected together).