86 More on PhotographyFocus LockFocus lock can be used to change the composition after focusingin AF-A, AF-S, and AF-C focus modes (0 78), making it possible tofocus on a subject that will not be in a focus point in the finalcomposition. If the camera is unable to focus using autofocus(0 80), focus lock can also be used to recompose thephotograph after focusing on another object at the samedistance as your original subject. Focus lock is most effectivewhen an option other than e (Auto-area AF) is selected for AF-area mode (0 82).1 Focus.Position the subject in theselected focus point andpress the shutter-releasebutton halfway to initiatefocus. Check that the in-focus indicator (I) appearsin the viewfinder.
