Canon EOS-1D X Mark II DSLR Camera (Body Only) - Manual (Page 230)

d : Program AE
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The focus indicator < o > blinks and focus is not achieved.
Aim the Area AF frame over an area having good contrast, then
press the shutter button halfway (p.62). If you are too close to the
subject, move away and shoot again.
Multiple AF points light up simultaneously.
Focus has been achieved at all those points. You can take the
picture as long as an AF point covering the target subject is lighting
up.
The focus indicator < o > does not light up.
In the AI Servo AF mode, it indicates that the camera is focusing
continuously. (The AF status indicator <
i > is displayed, but the
focus indicator < o > does not light.)
Note that focus lock (p.89) will not work in the AI Servo AF mode.
Pressing the shutter button halfway does not focus on the
subject.
If the focus mode switch of the lens is set to < MF > (manual focus),
set it to < AF > (autofocus).
The shutter speed and aperture are blinking.
Since it is too dark, taking the picture may result in a blurred subject
due to camera shake. Using a tripod or a Canon EX-series Speedlite
(sold separately, p.260) is recommended.
When the external flash was used, the bottom part of the
picture came out unnaturally dark.
If a hood is attached to the lens, it may obstruct the flash light. If the
subject is close, detach the hood before taking the picture with flash.
FAQ