Canon Auto Exposure Lock

Hello again and how are you all doing today.
I would love to talk to you today about a little tip i picked up when using your
Canon EOS 450D and its exposure settings when taking photos.
Even though the Canon EOS 450D is a sophisticated camera it is just a camera
and when taking photos it doesn't know any better all it does is change its setting
to its surroundings.
When the camera is in apature priority mode is switch on and consistently changes
it setting when looking at the bright sky, the shutter speed increases but when the
camera moves and is pointing at something in the distance like some tall buildings
the shutter speed decreases to its new settings, some times we want these setting
to change constantly when taking photos.
Lets take this photo and see what it looks like looking on the live view the sky has
overpowered the shot and the buildings are under exposed.
This is the tip that comes into play now as the camera is still in apature priority
mode on and we can give the buildings a boost in the same shot and this is what
you do.
Point the camera at the buildings only with no sky in view look at the shutter
speed it should have decreased some, now press the auto-exposure lock
button this lock in your setting of the buildings.
You can check this is correct in the view finder a star apears next the the shutter
speed that stays the same even when your moving the camera around.
Take the same shot again with the sky and the buildings together now check
your shot the buldings have become more brighter in your improved shots.
That is your Auto Exposure Lock button working to improve your shots.