Ricoh GF-1 - Manual (Page 9)

EN - 
Mounting the flash on a camera
1 Turn the lock ring as shown
in the illustration to loosen
it.
2 Insert the flash unit into the
hot shoe on the camera.
Securely insert the flash unit
all the way into the hot shoe.
3 Turn the lock ring as shown
in the illustration to fix the
flash unit to the camera.
Removing the flash from a camera
1 Loosen the lock ring completely before removing the flash
unit.
Turning on the flash
1 Press the ON/OFF button
to turn on the flash. When
the power is turned on,
the PILOT lamp lights up in
red and the flash starts to
charge.
2 After a few seconds, when
the PILOT lamp turns green,
the flash is completely
charged and ready to be
used.