How to install the monitor, and the choice of the lens!
From the green point of the door that installed? One of the 16 with the direction of the location of the No. 1, with 8 or 12 according to the direction of No. 2 to the door, see how much you want to buy the camera gun slightly, there are expensive you! The
2, the top left corner of the corner, that is, 28 meters wall, set a camera, to the yard, you can consider the choice of 16MM lens.
1, because the two points from the door are more than 10 meters, can not directly see the door, and see what is the use of the door? So the No. 1 installation point should be removed.
