The Etheroneph

The floor and outer wall of the astronomy room were of pure, geometrically ground crystal.

We only use diamond lenses, said Menni. They provide the broadest field of vision.

Its direct-vision magnification is about 600, Menni replied, but when that is insufficient we take a photograph and examine it under a microscope, which raises the power to 60,000 or more. The operation only takes a minute.