Fujifilm Z20fd 用户手册

To compose photographs with off -center subjects:

  Position the subject in the focus frame.

 Focus.

Press the shutter button halfway to set fo-
cus and exposure.  Focus and exposure will 
remain locked while the shutter button is 
pressed halfway (AF/AE lock).

Repeat steps 1 and 2 as desired to refocus 
before taking the picture.

  Recompose the picture.

Keeping the shutter button pressed halfway, 
recompose the picture.

 Shoot.

Press the shutter-release button the rest of 
the way down to take the picture.