3With the AE-L/AF-L button held down, recompose your photograph (A) and shoot (B).
AB
Adjusting Shutter Speed and Aperture
While auto-exposure lock is in effect, you can:
| Exposure mode | Operation |
| Programmed auto | Choose a new combination of aperture and shutter speed us- |
| ing flexible program ( pg. 84) |
| |
| Shutter-priority auto | Adjust shutter speed |
| Aperture-priority auto | Adjust aperture |
These operations will not affect the metered value for exposure. The adjusted values will be displayed in the viewfinder and the control panel on top of the camera.
Metering can not be adjusted while auto-exposure lock is in effect. Any changes to metering will only take effect after the AE-L/AF-L button is released.
7—AE Lock (
pg. 164)
This setting can be used to assign auto-exposure lock to the shutter-release button.
14—Center Weight Area (
pg. 168)
This option is used to set the size of the area assigned the greatest weight in center-weighted metering to 6 mm (0.24˝), 10 mm (0.39˝), 13 mm (0.51˝), or to the average of the entire frame.
21—AE-L/AF-L Button (
pg. 172)
Using this option, the AE-L/AF-L button can be set to lock focus and exposure, focus only, or exposure only, or to lock exposure when pressed and maintain this setting until pressed a second time or until the shutter is released.