How far can the focal length of the 6mm lens monitor
Posted: Mon Apr 05, 2021 12:33 pm
Each surveillance camera has a lens focal length, and different monitoring focal lengths correspond to different monitoring distances. As a common monitoring lens focal length of 6mm, do you know how far its monitoring distance is?
We know that the larger the focal length, the longer the monitoring distance, the smaller the lens Angle;On the contrary, the smaller the focal length, the closer the monitoring distance, the greater the lens Angle. At present, the focus length of the surveillance camera commonly seen on the market can be roughly divided into: 2mm, 4mm, 6mm, 8mm.
The effective monitoring distance of the focal length of the 6mm lens is about 5 meters to 18 meters, but the monitoring is for the purpose of security. It is necessary to see the monitoring distance of the face clearly, about 5-6 meters, and see the character features clearly about 12 meters.This means that 5-18 meters is a 6mm focal length monitoring range, and the effective monitoring distance for seeing a face is 5-6 meters.
Therefore, the focal length of 6mm surveillance camera lens is not suitable for installation in ordinary indoor, such as ordinary shops, families, etc. It is more suitable to be used for outdoor installation or large indoor environment, such as shopping malls, warehouses, etc.
We know that the larger the focal length, the longer the monitoring distance, the smaller the lens Angle;On the contrary, the smaller the focal length, the closer the monitoring distance, the greater the lens Angle. At present, the focus length of the surveillance camera commonly seen on the market can be roughly divided into: 2mm, 4mm, 6mm, 8mm.
The effective monitoring distance of the focal length of the 6mm lens is about 5 meters to 18 meters, but the monitoring is for the purpose of security. It is necessary to see the monitoring distance of the face clearly, about 5-6 meters, and see the character features clearly about 12 meters.This means that 5-18 meters is a 6mm focal length monitoring range, and the effective monitoring distance for seeing a face is 5-6 meters.
Therefore, the focal length of 6mm surveillance camera lens is not suitable for installation in ordinary indoor, such as ordinary shops, families, etc. It is more suitable to be used for outdoor installation or large indoor environment, such as shopping malls, warehouses, etc.