Nortel Networks S640 user manual Using the Zoom, Digital Zoom, Frame a Picture

Step 2 Frame a Picture

Using the Zoom

Rotate the zoom control to activate optical zoom.	Zoom out Zoom in
Rotate in the direction of g to zoom in on the subject.
Or rotate in the direction of f to have a wider view.
A zoom indicator is displayed at the top of the monitor
when the zoom control is rotated.

Optical Digital zoom zoom

Digital Zoom

When the camera is already at the maximum optical zoom magnification, rotating the zoom control in the g direction will trigger digital zoom. The subject can be magnified up to 4× of the maximum optical zoom ratio.

When using digital zoom, the camera will focus on the center of the frame and the focus area will not be displayed.

Maximum optical zoom Digital zoom is in effect.

CDigital Zoom and Interpolation

Unlike optical zoom, digital zoom uses a digital imaging process known as interpolation to magnify images, resulting in slight deterioration of picture quality according to the image mode (A 96) and digital zoom magnification.

Interpolation is applied at zoom positions beyond V. When zoom is increased beyond the V position, interpolation is initiated and the zoom indicator turns yellow to indicate that interpolation is being applied.

The position of Vmoves to the right as image size decreases, allowing for confirmation of the zoom positions at which shooting without interpolation is possible at the current image mode setting.

Basic Photography and Playback: Auto Mode

When the image size is small

• Digital zoom can be disabled from the Digital zoom option (A 127) in the setup menu (A 116).

27