In the detailed camera's user manual (canon S5 IS) states that (Page 84):
You can set the exposure and focus separately.
This is effective when the contrast is too strong between the subject and background or when a subject is backlit.
Locking the Exposure Setting (AE Lock)
Shooting Mode: Video, P, Tv, Av.
You must set the flash to off position. The AE lock cannot be set if the flash fires.
1 Focus on the part of the subject on which you wish to lock the exposure setting.
2 Press and hold the shutter button halfway and press the ISO button.
The exposure is fixed.
The * appears on the LCD monitor (or viewfinder).
3 Re-aim the camera to compose the shot as
desired and press the shutter button fully.
To Release the AE Lock:
Press any button other than the ISO button.
Well, i do just what it says and the lock is lost after ONE Shot!!!
Is there something wrong with my camera??