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AF Assist Infrared Light
When the subject is dark or very low-key and the camera can fail to
auto-focus, a red lamp may light on the front of the camera when the
shutter release button is half-pressed. This light assists the camera’s
auto focus function.
Notice:
The AF assist infrared light is
emitted only when the focus mode
is set to “S” (single focus mode).
Effective range of the AF assist
infrared light is limited. It does not
reach distant subjects. - Range:
9m/29.5 ft. (using 80 mm f/2.8
lens)
When using a lens hood or a
bellows lens hood (sold as an
optional accessory) that may
interfere the assist light, set focus
before mounting the hood.
The AF assist infrared light can be
disabled. Custom settings C-26.