AE Lock lets you use the exposure setting you choose, and then lock that setting when you recompose. here is how.
- Place the focus point on your subject.
- Press and hold the AEL button to get a meter reading. A star will appear in the bottom right of your viewfinder or LCD, letting you know that the exposure has been locked. Continue to hold the AEL button.
- Recompose your shot, and then take the photo.
- Note: To take more than one photo without having to take another meter reading, just hold down the AEL button until you are done using the meter setting.
