Pentax K-5 Operating Manual page 104

Press the four-way controller ( • )
and use the four-way controller
(• v) to set the maximum
sensitivity.
Press the
OK
button.
5 Use the four-way controller (• v) to select [AUTO ISO
Parameters] and press the four-way controller ( • ).
6
Use the four-way controller (• •)
to select the parameter and press
the OK button.
Increases the sensitivity
Slow
as little as possible
[_ Standard (default setting)
Fast Actively increases the
sensitivity
7 Press the MENU button twice.
The screen that was displayed before selecting the menu appears again.
Expanding the Dynamic Range
Dynamic range is the ratio that indicates the light level expressed by the
CMOS sensor pixels from bright areas to dark areas. The larger it is, the
better the whole range from dark to bright areas will appear in the picture.
By expanding the dynamic range, you can expand the light level
expressed by the CMOS sensor pixels, making it more difficult for
bright areas to occur in the image.
To expand the dynamic range, make the settings in [D-Range
Setting] of the [a Rec. Mode 3] menu. (p.214)