Modeling Flash - Canon 600EXII-RT Instruction Manual

Modeling FlashN
When the camera's depth-of-field preview button is pressed, the flash
fires continuously for approx. 1 sec. This feature is called "modeling
flash". This is useful for checking shadows cast on the subject by the
flash light and the lighting balance during wireless flash photography
(p.57, 89).
To avoid degrading and damaging the flash head due to overheating,
limit modeling flash up to "firing angle 14mm/20mm/24mm: 20 times",
"firing angle 28mm: 25 times", or "firing angle 35mm to 200mm: 30
times." After firing modeling flash for the above listed number of times,
allow a rest time of at least 10 min.
If you fire modeling flash for the above listed number of times, and then
fire the flash again repeatedly at short intervals, the safety function may
activate and restrict flash firing. With flash firing restriction level 1, the
firing interval is automatically set to approx. 8 sec. If this happens, allow
a rest time of at least 40 min.
During Live View shooting, firing modeling flash (by operating the
camera) is not possible.
Modeling flash (by operating the camera) is disabled when using the
flash with EOS M3, EOS M2, EOS M, EOS Elan II/Elan II E/50/50E, EOS
REBEL 2000/300, EOS REBEL G/500N, EOS REBEL K2/3000V, EOS
REBEL XS N/REBEL G II/3000N/66, EOS IX, or EOS IX Lite/IX7. Set
C.Fn-02 to 1 or 2 (p.113), then fire modeling flash using the test flash
button.
During normal flash photography or when using the flash as the master unit
in radio transmission/optical transmission wireless shooting, you can fire
the modeling flash with the test flash button (C.Fn-02/p.113).
Press the depth-of-field preview
button on the camera.
The flash fires continuously for
approx. 1 sec.
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