Wireless selector – Canon Speedlite 420EX User Manual
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Wireless Selector
The wireless selector has the following settings.
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.
Q • Even if the wireless selector is accidentally set to
operate as an on-camera Speedlite for normal flash photography.
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