
Normally I hang around the microscope group. But this was done with "photomacrography" gear rather than a microscope so here it is.
This is the breathing tube (like a snorkel) of a mosquito larva at the surface of the water. I made up an extremely small "tank" to hold the larva, and illuminated it from the rear with electronic flash. The lens was a Minolta Bellows Micro 12.5mm f2. The picture was taken with the aperture set to f4 using a Canon 10D.