Focus on off-centre subjects
Use focus locking to take control of composition
A common mistake when focusing a camera is to rely on its central focus point, even when the subject is off-centre.
If the part of the scene that is in the centre of the frame is much closer or much further away than your subject, this part will be in sharp focus, but the subject will be blurred.
This is the case if you’re using a state-of-the-art DSLR or a basic point-and-shoot compact.
You can manually select a focus point that overlaps your subject (see Photo Rescue, opposite), but sometimes you just don’t have time to fiddle around with your settings.
To get round this problem, simply place the central focus point over the part of the subject you want to be sharp, half-press the shutter release button to lock the focus, and then recompose as needed.