Following up from the article on focusing modes of your camera - when your subject is off-center, you have two options to acquire and hold focus:
use the appropriate off-center AF sensor
(but you can run into the problem of it not being a cross-type AF sensor), or
lock focus, and then recompose the shot
A scenario where you might want to use focus-lock & recompose, is when there is strong back-lighting, and your camera has difficulty auto-focusing. The photo above would be a typical example.
Here I was shooting Read more inside...