The Sub-Selector
Use the sub-selector to choose the focus point. The center of the sub-selector can
also be used to lock exposure and focus.
Focus-Point Selection
The sub-selector can be used to choose the focus point when an option other than [], [], and [] is selected for AF-area mode (AF-Area Mode).
Exposure Lock
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Exposure lock can be used to recompose shots after metering a subject that will not be in the selected focus area in the final composition.
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Exposure lock is particularly effective with spot and center-weighted metering.
Focus Lock
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Use focus lock to lock focus on the current subject when AF-C is selected for focus mode.
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When using focus lock, choose an AF-area mode other than [], [], and [].
Locking Focus and Exposure
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Position the subject in the selected focus point and press the shutter-release button halfway to set focus and exposure.
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Press the center of the sub-selector.
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Focus and exposure will lock while pressing the center of the sub-selector. Exposure will not change even when the composition is altered.
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An AE-L icon will be displayed in the monitors.
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Keeping the center of the sub-selector pressed, recompose the photograph and shoot.
Do not change the distance between the camera and the subject. If the distance to the subject changes, release the lock and focus again at the new distance.
Focus locks while the shutter-release button is pressed halfway. You can also lock focus by pressing the center of the sub-selector.
If [] is selected for Custom Setting c1 [], exposure will lock while the shutter-release button is pressed halfway.
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If you locked focus by pressing the center of the sub-selector, focus will remain locked between shots if you keep the center of the sub-selector pressed.
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Focus will also remain locked if you keep the shutter-release button pressed halfway between shots.