Axis Network video Manual page 20

20 CHAPTER 2 - NETWORk CAMERAS
Mechanical PTZ network cameras
Mechanical PTZ cameras are mainly used indoors and in applications where an operator is
employed. The optical zoom on PTZ cameras typically ranges from 10x to 26x. A PTZ camera can
be mounted on a ceiling or wall.
Figure 2.2d PTZ network cameras. From left to right: AXIS 212 PTZ-V (non-mechanical), AXIS 213 PTZ, AXIS 214 PTZ
and AXIS 215 PTZ.
Non-mechanical PTZ network cameras
A non-mechanical PTZ network camera, such as the AXIS 212 PTZ and its vandal-resistant
version (seen above), offers instant pan, tilt, zoom capabilities with no moving parts, so there is
no wear and tear. Using a wide-angle lens, it offers a wider field of view than a mechanical PTZ
network camera.
Figure 2.2e Images from a non-mechanical PTZ network camera. At left, a 140-degree overview image in VGA reso-
lution; at right, image when making a 3x zoom.
A non-mechanical PTZ camera uses a megapixel image sensor and allows an operator to instantly
zoom in on any part of a scene without any loss in image resolution. This is achieved by presenting
an overview image in VGA resolution (640x480 pixels) even though the camera captures a much
higher resolution image. When the camera is instructed to zoom in on any part of the overview
image, the camera uses the original megapixel resolution to provide a full 1:1 ratio in VGA resolu-
tion. The resulting close-up image offers good details with maintained sharpness. With a normal