Pentax Optio W20 Operating Manual page 99

Setting Automatic Sensitivity
You can choose an automatically adjusted range of sensitivity from
among five ranges: 64 to 100, 64 to 200, 64 to 400, 64 to 800 and 64 to
1600.
1
Press the MENU button in A mode.
The [A Rec. Mode] menu appears.
2
Use the four-way controller (23) to select [Sensitivity].
3
Press the four-way controller (5).
A pull-down menu appears.
4
Use the four-way controller (23) to select [Auto].
5
Press the four-way controller (5).
The ISO Correction in AUTO screen appears.
6
Use the four-way controller (2345) to choose a
sensitivity range.
7
Press the OK button.
The sensitivity range setting is saved.
8
Press the MENU button.
The camera returns to capture status with the current setting.
When the shooting mode is set to R, the automatically adjusted
range for Sensitivity is 64-1600 and cannot be set to any other
automatically adjusted range.
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