Rollei Profi Funk-Sender Instructions page 55

Canon master control M mode
4) Group C flash power output (A:B:C)
Press the OK button repeatedly until the arrow is indicating the group C . Press
the left and right button to set the output power of group C .
Press the OK button repeatedly until the focal distance number is highlighted
for each group and press the left and right button to change the value .
2. Canon camera internal menu setting
This is only available for Canon cameras of the series A and the camera exposure
mode needs to be P/AV/TC/M .
Enter the menu of your camera and select the flash control . Then select the
external flash function setting to set the strobe flash parameter options .
1) Enable the wireless flash function on the external flash menu .
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