Canon EOS 5D Mark II - EOS 5D Mark II 21.1MP Full Frame CMOS Digital SLR Camera, Service Manual

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General Information
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2) Manual focus (MF)
After the lens focus mode is switched to MF (or M), manual
focusing is enabled with the focusing ring.
⑴ Focus aid: During automatic AF point selection, works
with 9 AF points. Works with the user-selected AF point.
When focus is achieved, the focus confirmation light and
superimposed AF point display will light.
⑵ Electronic manual focusing functions during continuous
shooting and during the exposure.
7-4 Focusing point
1) Manually selected
selection:
The AF point selected from the nine AF points is used to
focus.
・ When the center AF point is selected in the AI SERVO AF
mode and C.Fn-17-1 (AF point activation area) is set, the
six invisible AF points above and below the center AF point
will function.
2) Automatic selection
⑴ One-Shot AF
・ Based on the subject information from the nine AF
points, the optimum subject is selected automatically for
focusing.
・ Generally, the closest subject will be selected for
focusing.
・ If more than one AF point achieve focus at the same
distance, they will all light in the viewfinder.
⑵ AI SERVO AF
・ The focusing starts at the center. Then if the subject
moves to an adjacent AF point, AI SERVO AF continues
to focus track the subject.
・ All 15 AF points are used.
7-5 AF point selection
Press the AF point selector, then use the Multi-controller
operation: (8 dire center press) or turn the Main Dial or Quick
Control Dial to select the AF point.
⑴ If you press the AF point selector and then press the center
of the Multi-controller, the center AF point will be selected. If
you press the Multi-controller in one of the 8 directions, the
respective AF point (left, upper left, lower left, top, bottom,
lower right, upper right, right) will be selected.
⑵ In the manual AF point selection mode, if you push the
Multi-controller in the direction of the current AF point, it
will switch to automatic AF point selection.
⑶ If you press the AF point selector and then turn the Main
Dial/Quick Control Dial clockwise, the AF point selection will
proceed in the following looping sequence: top, automatic
selection, center, upper right, right, lower right, bottom,
lower left, left, upper left, top, automatic selection... (If you
turn the dial counterclockwise, the selection sequence will
be in the reverse order.)