The focal length of the lens is different, the viewing angle and range that can be monitored will also be different. The following are the visible distances and ranges of some common focal lengths. You can refer to them when choosing a camera. 2.8mm, viewing angle 90 degrees, viewing distance 5-6 meters 3.6mm, viewing angle…
Lens focal length The camera lens is generally divided into two kinds of fixed focus and zoom. We should choose a lens with a suitable focal length according to the scope and size of the scene to be monitored. General fixed-focus lenses mainly have focal lengths such as 2.8mm, 3.6mm, 4mm, 6mm, 8mm, 12mm, 16mm,…
The choice of camera function is based on our surveillance needs, choose cameras with different functions. 1. The transmission method, we can choose, video cable transmission, network cable transmission, WiFi transmission, wireless AP transmission, 4G mobile network transmission and other different transmission methods of the camera. 2. Audio function, if we need to monitor the…
Surveillance camera is a kind of semiconductor imaging device, which has the advantages of high sensitivity, strong light resistance, small distortion, small size, long life, anti-vibration and so on. Surveillance camera security system. The image generation is currently mainly from CCD cameras, and the stored charge can also be taken out to change the voltage.…
