The movie linked below is from the dpBestflow.org website describing the camera scanning process. In this movie, the several types of hardware that you can use for the process are outlined, along with considerations about how to set up and work with them.
These include a bench system, rail system, bellows system, lens-attached system, and copystand system.
The entire best practice page can be found here.
Camera Scanning Devices from ASMP dpBestflow on Vimeo.