I have two cameras. Can I use one to image while using the other as an autoguider?
Yes. All cameras will work as autoguiders. Some cameras include built in relays for commanding the mount; if not, many mounts can be controlled via the Telescope Control, through the Starlight Xpress relay box, or by a direct connection to the PC parallel port. Please note that connecting two cameras usually requires separate ports. You should be aware that excessive shutter wear may occur with some cameras, and that a few camera models are too slow for effective autoguiding.