The Canon S1iS has tons of features -- even too many. The one that bugs me the most is the ability to customize the startup image: who cares for a startup image, let alone a customized one???
Anyhow, some features are "hidden" away. Here are a couple that I tend to forget about -- either forget they exist, or forget how to access them.
In automatic modes (like Auto, P and C) the camera selects the "best" combination of exposure time and aperture opening. As you may know, the exposure and aperture are inverse to each other:
Increasing the exposure time means the aperture must be larger, and vice versa.
You can change the settings selected by the S1:
1. Half-press the shutter button.
2. Press the [o] button (one below the Func button). Notice that a * appears in the viewfinder, telling you the exposure is locked.
3. Press the left and right buttons on the 4-way controller. As you do, notice that the expsure and aperture reciprocitate:
1/60 - F3.1
1/50 - F3.5
1/40 - F4.0
1/30 - F4.5
... and so on.
What good is this?
Moving the Focus Point