Stacking Microscope Photography
A series of images are shot at various focus depths, then stacked together with software to create a final image with much greater depth of field than traditional close-up photography.
I use a home-built, automated microsope (see the image in the Miscellaneous gallery) for photographing larger objects like insects, or a regular microscope focused manually for smaller subjects.
Most shots are at 5X, 10X, or 20X magnification, using brightfield or darkfield illumination.