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Auto Exposure and Auto Focus Lock
This is useful when you want to take a picture of a subject outside the AF
area or the contrast is too strong and you cannot achieve appropriate
exposure.
To use as the AF/AE LOCK button, set AF/AE LOCK /Fn2 in the Setup
menu to AF/AE LOCK. This should however be the camera default
setting.
The options are:
AF Only the focus is locked. AFL and focus indication are displayed.
AE Only the exposure is locked. AEL, aperture value, and shutter speed
are displayed when the exposure is adjusted.
AF/AE Both the focus and exposure are locked. AFL, AEL, the focus
indication, aperture value and shutter speed are displayed when the
focus and the exposure are optimised.
To use this feature:
Aim the AF area at the subject.
Press AF/AE LOCK button to fix the focus and exposure.
Move the camera to compose the picture and then press the
shutter button fully.
The setting is cancelled by pressing the AF/AE LOCK button again.
When AE only is set, after pressing the shutter button halfway to focus,
press the shutter button fully to make the exposure.