Canon EOS 4000D Instruction Manual page 98

S Selecting the AF PointN
Shooting Tips
When shooting a portrait up close, use One-Shot AF and focus

on the eyes.
If you set the composition after focusing on the eyes of the person to
be photographed, the vivid facial expression will stand out more in
the picture.
If it is difficult to focus, select and use the center AF point.

The center AF point is the most sensitive among the nine AF points.
To make it easier to focus on a moving subject, set the camera

to automatic AF point selection and AI Servo AF (p.96).
The center AF point will first be used to focus on the subject. During
autofocusing, if the subject moves away from the center AF point,
focus tracking continues as long as the subject is covered by
another AF point.
AF-Assist Beam with the Built-in Flash
Under low-light conditions, when you press the shutter button halfway
with the built-in flash raised, it may fire a brief burst of flashes. This
illuminates the subject to help autofocusing.
When the built-in flash is retracted, it will not emit the AF-assist beam.

The AF-assist beam will not be emitted when AF operation is AI Servo

AF, when in <3> or <5> mode, or when [Built-in flash firing: b] is
set in <C> or <P> mode.
The effective range of the AF-assist beam emitted by the built-in flash is

approx. 4 meters / 13.1 feet.
When you raise the built-in flash (p.103), the AF-assist beam will be

emitted as necessary. Note that in Creative Zone modes, the AF-assist
beam will be emitted according to the setting of [7: AF-assist beam
firing] under [53: Custom Functions(C.Fn)] (p.262).
If you use an Extender (sold separately) and the maximum aperture
becomes higher than f/5.6, AF shooting will not be possible (except in
[FlexiZone - Single] and [u Live mode] during Live View shooting). For
details, refer to the Extender's instruction manual.
98