Owner's Manual

Troubleshooting Guide
558
Depending on the attached lens, the number of usable AF points
and patterns and Area AF frame’s shape vary. The lenses are
categorized into 11 groups from A to K (p.115). Check which
group your lens belongs to. Using a lens in groups G to K will have
fewer usable AF points (p.118-121).
Regarding the AF points lighting up or blinking when you press
the <S> button, see page 108.
The registered AF point at that position is blinking (p.108, 500).
The manually-selected AF point (or zone) and the registered AF
point are displayed (p.107, 500).
Set the AF operation to One-Shot AF (p.100, 101, 314). Focus
lock (p.97, 101) is not possible with AI Servo AF/Servo AF (p.102,
315) and when servo AF is used with AI Focus AF (p.102).
The AF points light up in red only when focus is achieved in low
light or with a dark subject.
In the <d>, <s>, <f>, <a>, or <F> mode, you can set
whether to have the AF points light in red for when focus is
achieved (p.150).
There are fewer AF points or the Area AF frame shape is different.
The AF point is blinking or two AF points are displayed.
I cannot lock the focus and recompose the shot.
The AF points do not light up in red.