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What is a varifocal lense?

Varifocal means that the FOV and mm lense of the camera can be adjusted. Most of our cameras have a fixed lens. This means if you purchase a camera with a 3.6mm lense, you cannot change it. A few of our camera have varifocal lenses. These are lenses that can be adjusted after purchase. They will be indicated as varifocal lenses and the adjustably will also be listed. It might say SSC-111WC Varifocal 4-8mm. This means that the camera's lense can be adjusted anywhere between 4mm and 8mm to achieve the desirable Field of View (FOV). Keep in mind this is different than the lense being in focus. All of the cameras we sell already have the lenses in focus for a crisp and clear picture.

What’s the applications for IP camera?

IP cameras can be used in professional security systems and enable live video to be viewed remotely by authorized personnel. The IP cameras are easily integrated into larger, complex systems, but can also function as stand-alone solutions in entry-level surveillance applications. IP cameras can be used for surveillance of sensitive areas, such as buildings, casinos, banks and shops. Video of those areas can be monitored from relevant control rooms, at police stations and by security managers from a variety of locations. IP cameras are also effective substitutes for analog cameras in traditional law enforcement applications, such as keeping public places safe. IP cameras can be used for access control. People as well as vehicles can be recorded with time stamps that are easy to locate and review. The images can be stored in a remote location, making it impossible to steal the information.

IP cameras are easily connected to the existing IP network and enable real-time updates of high-quality video to be accessible from any computer on the network. Sensitive areas such as the server room, the reception area or any remote site can be closely monitored in a cost-effective and simple way, over the local network or via the internet. IP cameras enhance the monitoring of a retail location by ensuring that everything is in good order. An IP camera is a useful tool at the office. Areas like the reception area, and conference rooms can be monitored for Launchvity. In addition, users can keep track of who has been in the server room and take appropriate Launchon when problems occur. IP cameras are useful tools for the manufacturing industry. Monitor robots, other machines and production lines from the office or home and allow service engineers to access the cameras remotely. With Pan/Tilt/Zoom cameras it is possible to look at comprehensive as well as detailed views.


Why the DVR cannot control PTZ?

Possible reasons:

1, The PTZ breaks down
2, The PTZ decoder's setting, connection and installation is not correct
3, Part of lines'connection is not correct
4, PTZ setting in DVR’s menu is not correct
5, The protocol of PTZ  and DVR are unmatched
6, The address of PTZ  and DVR are unmatched
7, When connected with many decoders, the remote end of PTZ decoder's A and B line should add a 120Ω resistance to eliminate reflex and match the impedance, or the control of PTZ will become unsteady.
8, The distance is too long