35
When the AF360FGZ is used in combination with
the camera's built-in flash, twin flash photography is
possible with the output ratio of the light intensity
controlled. The ratio of flash light intensity between
the built-in flash and the AF360FGZ flash unit is 1:2.
• This method of photography is for the
AF360FGZ separated from the camera. (Refer
to page 57 on using the AF360FGZ separated
from the camera.)
■ Procedure
Turn on the power switch.
Set the sync mode switch to the contrast-
control position [ ]
Adjust the zoom position according to the lens
in use.
• With an autofocus lens, the [A.Zoom] mode
will set it automatically.
• If the AF360FGZ is much closer to the subject
than the camera's built-in flash, use the
[M.Zoom] mode to set the zoom position to a
shorter lens focal length. Otherwise, the flash
coverage may be insufficient causing a dark
periphery in the picture.
Make sure that the flash ready lamp on the
AF360FGZ lights up and camera's built-in flash
is charged before releasing the shutter.
CONTRAST-CONTROL-SYNC FLASH
34
High-speed Sync Guide Number [For ISO 100]
[Example]
Double the guide numbers for ISO 100 when using ISO 400 film.
Lens zoom position = 85mm, shutter speed = 250
Guide Number for ISO 400 would be 16 × 2 = 32.
Zoom Position
Shutter speed
250 500 1000 2000 4000 6000
85mm 16.0 12.7 9.5 6.9 5.1 4.3
70mm 14.7 11.6 8.7 6.4 4.7 3.9
50mm 13.4 10.6 7.9 5.8 4.2 3.6
35mm 11.1 8.8 6.6 4.8 3.5 3
28mm 9.8 7.7 5.8 4.2 3.1 2.6
24mm 9.4 7.4 5.5 4.1 3.0 2.5
20mm 6.2 4.9 3.7 2.7 2.0 1.7
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