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With AF point expansion, choices
of AF tracking methods will change
When the conditions in both case 1 and case 2
do not apply, AF operation according to C.Fn III-
2 Sensitivity is prioritized (For example, if Slow is
selected, focus will not quickly shift to the
background even if the subject moves away
from the expanded area AF points.)
When conditions differ from case 1, and the
camera determines that the AF point should be
transferred within the area, it quickly transfers
to that AF point and carries out focusing.
The C.Fn III-4 Tracking method function is always
available when C.Fn III-8 AF point expansion is
active. With this combination, the way the AF
points show up, and the speed at which focusing
occurs can change depending on the specific
settings and is subject to the conditions at that
time. When ‘Main Focusing Point Priority’ is
selected and a new subject is detected, the AF
point showing the fastest response is used first,
even if it is not the manually selected focusing
point. Focusing control reverts to the manually
selected focusing point as soon as possible if
the movement of the subject allows it.
2
C.Fn
Mutual association
III-8 Area expansion, III-4 Tracking method, and III-2 Sensitivity
There are three cases for the three C.Fn’s related to AI Servo AF operation
Case 3
When neither Case 1 nor Case 2 applies, AF operation is carried out
according to the Tracking Sensitivity settings
Case 2
Regardless of the C.Fn III-4 Tracking Method setting, if there is an AF point
within the expanded area that should be used, control will quickly transfer
to that focusing point.
Case 1
When C.Fn III-4 option 0: Main focus point priority is selected and the
selected AF point detects a new subject, the camera quickly focuses on that
subject.
* New subject refers to a subject that the manually selected AF point lands on that is closer than the subject that was tracked up to that time.
AF point selection
Assist AF points of the expanded area
