QUOTE(Seng_Kiat @ Mar 24 2009, 01:55 PM)
hi all .. 'morning' ..
how to use exposure lock aka AEL button? I read the manual but still do not get it ..

.. any1 can explain? ..
when you press the shutter release button, I think by now you know the focus will lock. At the same time, the exposure - shutter speed and/or aperture (depending on which mode you on) will also lock. When you full press, the picture is taken with what you focused with the exposure selected. HOWEVER, if you were to recompose before fully press, the shutter speed and/or aperture will change according to the object exposure.
For example, you want to take a building with a sky background in the afternoon. When you focus the building and half press the shutter release, you may get F4, 1/200s. Then you recompose, where the focus point now is the sky - you may get F4, 1/500s. If you were to fully press, the building will become dark. So before you recompose, press and hold the AEL button, both shutter speed and/or aperture will remain no matter where you are recomposing now
that is the AEL button.
if you don't prefer HOLD, you can toggle it so that when you press 1 time, AEL will ON. Press again, AEL will off