All three use my 1960's vintage Durst enlarger frame reworked into a copy stand. Obviously these will be hard to find but you can support the camera many ways using home made or commercial equipment.

Left: Fluorescent ringlight - coin supported on dowel over black background in refrigerator drawer which reflects some light onto edges of coin. Smaller dowel in foreground is used for tiny coins.

Center: Compact fluorescents can be slid (near, far, left, right)and tilted as needed for best results. Two in a small movie bar are shown but one can be used. Aluminum foil shown in drawer can be used if additional edge light is desired. Diffusers or reflectors may be added to lights as desired but two bare tubes usually provide a broad light source as desired.

Right: Camera is set up near a bright but not directly sunny window for natural light. Can around the dowel coin support shadows the black background making it blacker. Wired remote release helps cut down on camera shake. Copy stand is mounted on lazy-susan allowing rotation in the light to change angle as desired. This is important since this light is rather strongly directional and a big difference can be seen as you rotate.

Results from these rigs can be found on my
PBase coin gallery.
Images with three coins stacked vertically are Ringlight (top), Compact Fluorescent (middle) and Window/Daylight (bottom).