Canon EOS Rebel T7i Telephoto Lens Kit 业主指南

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: Changing the Autofocus OperationN

By default, the AF points light up in red when focus is achieved in low-
light conditions or on a dark subject. In Creative Zone modes, you can 
set whether to have the AF points light up in red when focus is achieved 
(p.394).

Under low-light conditions, when you press the shutter button halfway, 
the built-in flash may fire a brief burst of flashes. This illuminates the 
subject to help autofocusing.



AF-assist beam will not be emitted from the built-in flash in <7>, <3>, 
<5>, or <8: C> modes, or when [Built-in flash firing] is set to 
<b> in <A>, <C>, <2>, <4>, <8: qPF>, or <v: 
GWXZHc

> modes.



The AF-assist beam will not be emitted with AI Servo AF operation.



The built-in flash makes a sound when firing continuously. This is normal 
and not a malfunction.



The effective range of the AF-assist beam emitted by the built-in flash is 
approx. 4 meters / 13.1 feet.



In Creative Zone modes, when you raise the built-in flash with the <D> 
button, the AF-assist beam will be emitted as necessary. Note that 
depending on the setting for [5: AF-assist beam firing] under [54: 
Custom Functions (C.Fn)], AF-assist beam will not be emitted (p.392).