Attachment of the flash unit
Turn off the power of the flash unit.
If the built-in flash of the camera is protruding, lower it before
attaching the flash unit.
Remove the protective cap from the terminal of the
Multi Interface foot of the flash unit and remove the
shoe cap from the camera.
Rotate the lock lever towards [RELEASE] while
pressing the release button.
Firmly insert the Multi Interface foot all the way into
the Multi Interface Shoe of the camera in the direction
of the arrow.