The prototype device, shown above next to a Canon 8-15 mm fisheye lens, has a 12mm focal length. The breakthrough in this technology is twofold. Firstly, the system uses perfectly spherical monocentric lenses made of concentric glass shells. Their spherical shape promises sharper and less prone to distortion than traditional wide-angle designs. And in order to get the light from these spherical lenses to hit the sensor properly, the researchers used "a dense array of glass optical fiber bundles that are polished to a concave curve on one side so that they perfectly align with the lens’ surface."