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Focus Lock
Focus lock can be used to change the composition after focusing,
making it possible to focus on a subject that will not be in a focus
point in the final composition.
It can also be used when the
autofocus system is unable to focus (pg. 80).
1 Focus.
Position the subject in the selected focus
point and press the shutter-release
button halfway to initiate focus.
2 Check that the in-focus indicator
(I) appears in the viewfinder.
Single-servo AF
Focus will lock automatically
when the in-focus indicator
appears, and remain locked
until you remove your finger
from the shutter-release
button.
Pressing the AE-L/AF-L button while the shutter-release
button is pressed halfway will lock both focus and exposure
(an AE-L icon appears in the viewfinder when exposure is
locked; see page 126).
A See Also
If On is selected for Custom Setting c1 (Shutter-release button AE-L,
pg. 296), exposure will lock when the shutter-release button is pressed
halfway.