Wireless Selector - Canon Speedlite 420EX Instruction Manual

Wireless Selector

The wireless selector has the following settings.
• Even if the wireless selector is accidentally set to <
operate as an on-camera Speedlite for normal flash photography.
For Normal Flash Operation
• Set the wireless selector to OFF to
use the 420EX as a normal, on-
camera Speedlite.
For Wireless Flash Operation
• Set the wireless selector to SLAVE to
use the 420EX as a wireless slave
unit.
The flash coverage is set to 24mm
automatically.
>, the 420EX will still
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