Basically, almost any camera can be adapted to work on a microscope if it has threads (such as those used for attaching filters and telephoto lenses.)  A dedicated microscope camera, built for use on the scope will usually produce better pictures than a consumer camera, but it depends on the specs.  The configuration above is a sort of minimum entry-level package for clinical work and documentation. Cameras can be more expensive than the scope, but it is important to understand that they can never improve upon the optics of the scope. See article on how to put together a darkfield microscope.