This should also work well for scanning art.
Digital cameras can be used to create high quality scans of film or print originals that can offer rapid throughput at a reasonable cost, provided that a good digital camera is available. This page outlines the considerations for setting up and operating a camera scanning system.
With some special hardware, along with some proper techniques, it’s possible to make excellent digitizations of film and print originals using a digital camera. The camera’s sensor provides excellent resolution for the scan, even as compared to dedicated film scanners such as Imacon. A DSLR’s built in anti-moire filter also helps in minimizing the appearence of dust and minor scratches present on the media being scanned.
You can compare the relative quality of a file made with an Imacon film scanner and a file made with a Canon 1Ds MkII.