Canon CANONET G-III L19 How To Use Manual page 18

Using Conventional Flash Units
The Canonet G-III has a socket for
ventional type flash untis.
Attach flash unit to the accessory shoe of
the camera, and connect the cord of the
flash unit to the flash socket of the camera.
17
con-
Select correct blue number (14, 20, 2 8 ) *
engraved on the aperture ring, matching with
guide number of flash unit.
With flash unit, set shutter speed at 1/30 sec.
With electronic flash unit, any shutter speed
can be used.