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264
Selecting the AF Operation
AF-Assist Beam
Under low light, the AF-assist beam may be lit continuously when you
press the shutter button halfway. This makes it easier to focus with AF.
o
The AF-assist beam does not re when [
2
1: AF operation] is set to
[Servo AF].
o
The AF-assist beam does not re when Touch AF is used (when [
z
5:
Touch Shutter] is set to [Disable]).
o
A small series of ashes is red by external ash units equipped with an
IR AF-assist beam. However, the beam does not re when you are using
a Speedlite 90EX, Macro Ring Lite, or Macro Twin Lite, or in wireless
ash shooting using radio or optical transmission.
o
A small series of ashes is red even if you set the external ash’s AF-
assist beam emission method in the Personal Functions to infrared AF-
assist beam ring. To disable AF-assist beam ring, set [
2
4: AF-assist
beam ring] to [Disable] (p.295).
o
Focus range with the AF-assist beam is generally no more than
4 meters / 13.1 feet.
o
The AF-assist beam ring in [
t
], [
d
], [
s
], [
f
], [
a
], and [BULB]
modes depends on the setting in [
2
4: AF-assist beam ring] (p.295).
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