What are the CS and C installation methods of camera lens?

There are two kinds of lens installation methods: C-type installation and cs-type installation. The lens commonly used in TV monitoring system is C-type mounting lens (in32 threaded seat), which is an internationally recognized standard. The diameter of the lens mounting part is 25.

4 mm (inch), and the distance from the lens installation reference to the focus is 17.

526

Well, the lens interfaces of most cameras are cs-type, so it is necessary to add an a 5 when installing a C-type lens for cameras with cs-type interfaces.

Mm thick collar, and when the cs lens is installed on a camera with a cs interface, the collar is not needed.