The first component in any CCTV system is the lens. It defines the breadth of view or width and height of the picture. Attention to detail is very important when choosing a lens. A lens that captures an area that is too large will produce images that are too small for use in investigations.
For example, a very wide angle lens place on a camera that is 50 feet or more from the target scene may take a “good picture” but the person or object you wish to see will be very small, making recognition difficult. Anyone who has taken a picture of a person from far away, hoping to also capture an interesting background scene will easily understand this. The background may be easy to view but the person is hard to see. To compensate for this circumstance motorized zoom lens are used to change the field of view remotely. This is especially useful when the camera is monitored in a security station remote from the camera scene. A qualified expert can help you select the right lens for each viewing area.
Cameras today come in a variety of sizes, shapes and include a wide range of features. Choosing the right camera for the project is important in achieving long equipment life and consistent performance. Cameras should be selected based on the application and the choice must allow for environmental characteristics such as available light and the need for detailed resolution. Camera housings also play a significant part in performance. Housings protect the camera equipment for tampering and from the elements. Housings can also conceal cameras so that they appear as other ordinary devices such as EXIT signs and smoke detectors.