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CCTV – Guide to CCTV cameras, security camera systems and surveillance cameras
CCTV cameras and means closed circuit television have become important in preventing crime. There are several types of video surveillance systems on the market and each uses different types of cameras, depending on your application.
Prices on href = "http://www.ukcctv.co.uk" title = "The camera CCTV> CCTV cameras use CMOS (Complementary Metal Oxide Semiconductor) technology that produces images of poor quality and low light sensitivity. The more expensive cameras use CCD (charge coupled device) chips, and offers a better image quality. CCD chips are the size 1/4-, 1/3- or 1/2-inch, and the picture quality and price increases.
Black and white cameras are generally cheaper and offer better handling of images in low lighting. color cameras are still the main option, but a higher price. If the device has to record at night or in dark areas, you need an IR (infrared) camera, which can be stored black and white when light is not present.
The image quality of a camera is measured in TV lines, or lines resolution. Great TVL will result in more lines of resolution and picture quality is much clearer. The standard size is 380 TV lines to 420 lines TV cameras and High Quality up to 480 TV lines to 570 TV lines.
Photosensitivity of the chamber is measured units called LUX higher number, the greater the amount of light needed to capture images. Cameras, which are very low LUX rating, the approach is zero can capture images in almost any light. If the area is light, constantly changing the camera lens with auto iris is necessary to produce the finest images. Manual or fixed iris lens compatible with the areas where the light output remains constant.
Width and height the size of the image produced by the lens of the camera field of vision called or field of vision. If you know where you place the camera, you can calculate the distance between the film and then the optimal target, which gives the maximum field of vision.
The camera body is totally dependent on the development and the implementation of the camera. A dome that has been dyed black is pleasing to the eye and allows a wide field of vision. Any device installed outside, have a strong protection.
The best CCTV camera you buy the one that best suits your environment and application. If it is necessary to record the finest details, you should consider buying a camera with high-TV lines. For the record images at night or in low light, an infrared camera is needed. If you need a large space to save time, your first priority in choosing a camera should be one with a wide field of vision.
About the Author
Bilal Qayyum, an Internet Marketer and a Research on Home Security Cameras, currently doing research on cctv cameras, wireless cameras.
Nature: Greatest Kills @ High Speed Camera Slowmotion
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