Canon EOS 90D DSLR Camera with 18-135mm Lens - Manual (Page 599)

599
Troubleshooting Guide
The AF point is blinking or two AF points are displayed.

Regarding the AF points lighting up or blinking when you press the <
S
>
or <
G
> button, see = 133.
The AF points do not light up in red.

The AF points light up in red when you shoot under low light or when
focus is achieved on a dark subject.

In the <
d
>, <
s
>, <
f
>, <
a
>, or <
F
> mode, you can set whether to
have the AF points light up in red for when focus is achieved ( = 569).
I cannot lock the focus and recompose the shot.
 Set the AF operation to One-Shot AF. Focus lock is not possible in the
AI Servo AF/Servo AF mode or when servo takes eff ect in AI Focus AF
mode ( = 80, = 125).
The continuous shooting speed is slow.
 The continuous shooting speed for high-speed continuous shooting may
be lower, depending on conditions such as these: temperature, battery
level, fl icker reduction, shutter speed, aperture, subject conditions,
brightness, AF operation, type of lens, live view shooting, use of fl ash,
and shooting settings, etc. For details, see = 150 or = 152.
The maximum burst during continuous shooting is lower.
 If you shoot a subject that has fi ne detail such as a fi eld of grass, the fi le
size will be larger, and the actual maximum burst may be lower than the
number listed on = 615.