Canon MR-14EXl Instructions Manual page 28

ETTL
Selecting the Flash Tube
Follow the same procedure as for "Firing Both Flash Tubes" except for step
2. For step 2, follow the operation below.
Press the < <i > or < C> > button to
move the bar - all the way to the
left or right to the ;.D or
at:
icon.
• ;.D: Fires only flash tube A
~
at::
Fires only flash tube B
~
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