Pentax Optios7 Operating Manual page 76

Setting the Digital Zoom
The digital zoom is set to O(On) in the default settings. To take pictures
using only the optical zoom, set the digital zoom to P (Off).
1
Press the MENU button in Capture mode.
The [A Rec.Mode] menu appears.
2
Use the four-way controller (23)
to select [Digital Zoom].
3
Use the four-way controller (45)
to select O (On)/P (Off).
4
Press the shutter release button
halfway.
4
The camera is ready to take pictures.
Set the Movie anti-shake to Off to use the digital zoom in Movie
mode.
74
Saving the Digital Zoom Function Setting
Rec. Mode
EV Compensation ±0.0
Movie
Digital Zoom
Instant Review
0.5sec 0.5sec
Memory
Green Button
MENU Exit
p.102
1