Camera gun 4MM, 6MM refers to what?
General camera commonly used lens specifications are 4mm, 6mm, 8mm, 16mm, 25mm and so on.
Camera gun parameters in the 4MM, 6MM, etc. refers to the camera is configured lens focal length.
Monitor the camera said 4mm, 6mm is the size of the camera to monitor the camera, the smaller the number of mm mm, the larger the area of the monitor, the wider the angle, but the distance is not far, mm the greater the number of monitoring the farther away , But the monitoring of the angle will be a lot smaller, the specific parameters can refer to the following table, I was monitoring camera manufacturers, if you need a camera can contact me, the user name is my phone, hope my answer can make you satisfied, If you still do not understand the phone can be consulted
