The night vision effect of the surveillance camera is related to the monitoring distance.
Generally speaking, with the increase of monitoring distance, the night vision effect may gradually weaken. This is because infrared light, etc., will have a certain attenuation in the propagation process. When the distance is far, the intensity of infrared light reaching the target object may reduce, thus affecting the clarity and brightness of the imaging. Moreover, the farther the distance is, the greater the influence of various interference factors in the environment on the signal may be, further affecting the night vision effect.
In addition, if the night vision capability of the camera itself is limited, it may be difficult to clearly present the target object at a longer monitoring distance. However, if the camera has a strong infrared lamp or high-performance sensor, to a certain extent, it can maintain a relatively good night vision effect at a longer distance.