1. She uses only the pinhole camera or, as it was known in pre-photographic times, the cameraobscura.

2. A hole in the cave wall will act as a pinhole camera and project a laterally reversed, upside down image on a piece of paper.

3. The pinhole camera spotted several locations and sources of high gamma radiation activity outside the reactor vessel presumably from reactor components blown from the core by the force of the 500 PSI explosion.