Canon 0585C006, Инструкция по эксплуатации

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> : Setting Personal Functions
P.Fn-05: ] (AF-assist beam emission method)
You can select AF-assist beam emission method.
0:
J
(Small series of flashes fired by flash)
AF-assist beam, which uses a small series of flashes, is emitted
(p.22).
1:
K
(Infrared)
Infrared AF-assist beam aiming at the center AF point is emitted.
Position the subject in the center of the viewfinder and focus. The
effective range is approx. 0.7 - 8 m/2.3 - 26.2 ft.
P.Fn-06:
+
(Quick flash)
You can set whether or not to fire the flash when the flash-ready lamp is lit
in green (before the flash is fully charged) to shorten the charge waiting
time. Quick flash also functions during continuous shooting.
0: ON (Enabled)
1: OFF (Disabled)

When 1 is set, manually select the center AF point. When an AF point
other than the center AF point is selected, focusing with the AF-assist
beam is not possible (AF-assist beam is not emitted).

When the color filter is attached (p.37), the AF-assist beam, which uses
a series of small flashes, is not emitted. If AF-assist beam is required, set
the value to 1.
When Quick flash is fired during continuous shooting, underexposure may
occur since the flash output decreases.