I've been trying out a cheap digital microscope for photographing metal detecting finds, check out these blog posts:
Photographing metal detecting finds with a cheap digital microscope, Part I (https://www.detecting.org.uk/blog/2010/09/photographing-metal-detecting-finds-with-a-cheap-digital-microscope/)
Photographing metal detecting finds with a cheap digital microscope, Part II (https://www.detecting.org.uk/blog/2010/09/photographing-metal-detecting-finds-with-a-cheap-digital-microscope-part-ii/)