Speed Dome Cameras - PTZ Camera
On the basis of application, there are two groups of Speed domes; namely Outdoor Speed Domes & Indoor Speed Dome. These Cameras are also known as PTZ Cameras.
Outdoor Speed Domes are designed for different weather conditions (weatherproof), have internal heaters, are robust and operate in varying light conditions(i.e. low light, Day/Night), etc. An indoor Speed Dome, as the name suggests, should only be used on premises with protection from external conditions. Some external Speed Domes also have 'alarms' facilities such that they can be positioned to a number of preset positions according to the alarm trigger; hence operate very well inconjunction with PIR detectors.
Speed Domes support many features including, Tours, Patterns. Speed Dome cameras are usually controlled using common control wires with each camera connected in parallel. The camera is addressed and therefore controlled using a data protocol where each instruction consists of a camera address and command.
A Speed Dome Keyboard (Controller) or DDS DVR can be used to control these PTZ cameras from a remote site. Each controller is able to control many PT / PTZ cameras using some form of wired communication lines (like RS485). Unfortunately, there is no standard among manufacturers for control of these cameras so care should be taken on selecting a suitable controller. It is recommend to confirm that PTZ controller and Camera can support the same communication protocol (i.e. PELCO) and support the same communication lines (i.e. RS485).
Speed Dome cameras are also known as PT and PTZ cameras.
PT cameras allow you to adjust the position ('pan' is side-to-side, 'tilt' is up-and-down) but do NOT allow control of focus ('zoom'). They cost more than fixed cameras but not as much as a full PTZ camera. PT cameras tend to be for internal use only.
PTZ cameras allow you to adjust the position ('pan' is side-to-side, 'tilt' is up-and-down) and focus ('zoom') of the camera using a remote controller. Due to this added functionality, these cameras tend to cost much more than non-PTZ (fixed) cameras.