As a result, the Multi focus area setting is useful when subjects you want in focus are slightly
If the camera keeps focusing on the wrong subject, set Auto Focus Area to Spot (see page 74), which focuses on only the center focus area. Then use Focus Lock (see page 40) to focus specifically on your subject.
Optimizing Focus
When the camera cannot auto focus, the focus brackets turn red. This indicates the picture may be out of focus because the subject is out of the focus range or the scene has low contrast (that is, the scene is dark or the subject is a single color with no crisp edges).
For the Normal Focus Range
If the camera is set to Normal Focus 
(see page 42) and the camera cannot focus, the camera will still take the picture. Try releasing the Shutter button, reframing the subject, and then pressing the Shutter button halfway down again. If the focus brackets are still red, release the Shutter button and try one of the following:
•If the scene has low contrast, use Focus Lock (see
page 40) and aim at a point on the subject that has more colors or crisp edges.
•If the subject is too close (less than 500 mm or 20 in), move farther away from the subject or use the Macro 
or Super Macro 
focus range (see page 42).
•If the solutions above do not improve the focus, try using
Manual Focus 
(see page 43).