Specifications
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2.2.1 Fixed network cameras
A xed network camera, which may come with a xed or varifocal lens, is a camera that has a
xed eld of view (normal/telephoto/wide-angle) once it is mounted. A xed camera is the
traditional camera type where the camera and the direction in which it is pointing are clearly
visible. This type of camera represents the best choice in applications where it is advantageous
to make the camera very visible. A xed camera usually enables its lens to be changed. Fixed
cameras can be installed in housings designed for indoor or outdoor installation.
Figure 2.2a Fixed network cameras including wireless and megapixel versions.
2.2.2 Fixed dome network cameras
A xed dome network camera, also called a mini dome, essentially involves a xed camera that
is pre-installed in a small dome housing. The camera can be directed to point in any direction.
Its main benet lies in its discreet, non-obtrusive design, as well as in the fact that it is hard to
see in which direction the camera is pointing. The camera is also tamper resistant.
One of the limitations of a xed dome camera is that it rarely comes with an exchangeable lens,
and even if it is exchangeable, the choice of lenses is limited by the space inside the dome
housing. To compensate for this, a varifocal lens is often provided to enable the camera’s eld
of view to be adjusted.
Axis xed dome cameras are designed with dierent types of enclosures such as vandal-resistant
and/or IP66-rated for outdoor installations. No external housing is required. The mounting of such
a camera is usually on a wall or ceiling.
Figure 2.2b Fixed dome network cameras. From left to right: AXIS 209FD and AXIS 216FD (also available in
ruggedized and megapixel versions), AXIS P3301 and AXIS 225FD.
NETWORK CAMERAS - CHAPTER 2