Canon 850 IS - Manual (Page 38)

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You can shoot zoomed images using the combined digital and
optical zooms. The focal lengths (35mm film equivalent) and
characteristics are as follows.
Using the Digital Zoom
Shooting Mode
Option Focal Length Characteristics
On 28 – 420 mm
You can shoot at a maximum zoom factor
of approximately 15x using a combination
of the optical and digital zoom features.
Off 28 – 105 mm Shoots without using the digital zoom.
The digital zoom cannot be used when the LCD monitor is
turned off.
The digital zoom cannot be used in the
or (Postcard
mode) or the (Widescreen) mode.
1
(Rec.) Menu [Digital
Zoom] [On]*/[Off].
See Menus and Settings (p. 23) .
*Default setting.
2 Press the zoom lever toward and shoot.
The combined optical and digital
zoom factor will appear on the LCD
monitor.
Based on the number of recording
pixels set, the Safety Zoom feature
calculates the maximum zoom fac-
tor beyond which image quality will
begin to deteriorate. The digital zoom pauses at this zoom
factor for a moment, and
appears on the LCD monitor.
If you press the zoom lever toward again, you can zoom
in even closer. In this case, the displayed zoom factor
changes from white to blue.
Pressing the zoom lever toward
reduces the zoom factor.