Yes, I photograph very tiny objects every day.
You CAN do it with an SLR, macro lens and extension tubes on a very
sturdy tripod or a sandbag…
Or you can use one of the small USB microscope cameras like the
Dino-Lite, which has magnification up to 200X
www.thelittlecameras.com and built-in LED lighting. Just plug it
into a USB port on your computer and take pictures…
Or you can use one of the microscope cameras designed to replace the
objective lens on a microscope…
Or you can get an adapter which allows your SLR to be used on a
In any case, a ring light would be a rather poor choice for the
microcrystals. A much better choice would be a light that grazes the
microcrystals (comes ACROSS them at a low angle). This will create
relief to help define the crystals. The frontal lighting of a ring
light reduces detail and is often odd-looking.
A fiber optic light source would be ideal, but an ordinary desk lamp
with a screw-in incandescent bulb will also work well, even better
if you use a clear bulb rather than a frosted one. Be sure to set
the white balance to match the light source.