At the heart of the GoPro lies a Sony IMX117 image sensor.

According to our pals at Chipworks, the Exmor-R sensor features a "1.55 µm back illuminated design on a ceramic substrate"—cool!

The sensor supports 12 MP imaging at up to an impressive 35 fps, even though the camera advertises a burst rate of 30 fps.

Check out their teardown for even more info on the Hero3!