Currently, the surveillance cameras produced by model gun camera manufacturers are mainly divided into several forms:
Gun type, two, hemisphere type, three, global type, four, infrared type.
Gun-type cameras have a wide range of applications. According to the different lenses used, remote monitoring or wide-angle monitoring can be achieved. The application is also wider than the hemisphere. The zoom range of the gun camera depends on the lens used, and can be several times Dozens of times, and the replacement of the lens easier, in addition to the need for a bolt if you need to configure the protective cover.
1, according to the choice of ambient light. If the light conditions are not ideal, you should try to use the camera with lower illumination, such as color ultra-low illumination camera, color black and white automatic conversion dual-purpose camera, low-light black and white camera, etc., in order to achieve better results. It should be noted that if the illumination of the light is not high and the user has a high requirement for the intelligibility of the monitoring image, a black and white camera should be selected. If there isn't any light, you must add infrared light to provide illumination or use the camera with infrared night vision function, which is characterized by: the camera itself has a color black and white conversion mode, comes with a lens and mounting bracket, a unique vacuum packaging design, used indoors No need to install protective cover, and beautiful appearance, good concealment, excellent cost performance.
2, according to the installation site selection. Due to the ordinary gun camera, it can be wall-mounted or ceiling-mounted, so indoor and outdoor are not limited, and it is more flexible.
3, according to the installation method selection. If fixedly installed, the camera usually uses ordinary gun cameras. The ordinary gun-type camera is equipped with a power zoom lens, but the price is relatively high, and the installation is not as easy as an integrated camera.
4, according to the requirements of image clarity to choose. If the resolution of the image quality is relatively high, a camera with a higher TV line indicator should be selected. In general, for color cameras, the 420 and 520TVL (television lines) are medium resolution cameras, and the 480TVL and above are high resolution cameras. The higher the sharpness, the higher the price.
5, should also pay attention to some of the performance indicators on the product description. Such as SNR, auto iris lens drive and so on. The signal-to-noise ratio in the general TV monitoring system must be greater than 48dB, which not only meets the requirements of the industry standard of not less than 38dB. More importantly, when the ambient illumination is insufficient, the higher the S/N ratio, the more clear the camera image becomes. . The drive mode of the lens is generally dual-drive, so that you can use the DC or video-driven auto iris lens.
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