Canon EOS-3 Instructions Manual page 80

AE Lock
Custom Function CF-4-1 enables AE lock with the shutter button (instead of the
CF
< > button) pressed halfway and focusing with the <
Partial or spot metering is recommended for AE lock over a specific point. See page
54.
If One-Shot AF and evaluative metering are set, pressing the shutter button halfway
to focus will automatically set AE lock at the same time.
80
AE lock indicator
3 Focus at the desired point,
recompose the shot, and take the
picture.
• When the shot is recomposed, the
exposure level indicator will show the new
exposure level in real-time relative to the
locked exposure level.
AE lock exposure level
Real-time exposure level
> button. See page 108.