In order to choose a camera, you will need to take some measurements of your laser.
We have a great resource to help you with camera selection: Which LightBurn Camera Should I Get?
More information about using a camera is available in our documentation here: https://lightburnsoftware.github.io/NewDocs/UsingACamera.html#choosing-a-camera
Selecting any camera from the list provided will take you to the web store, where you can make your purchase. Any of the listed cameras will work.