Graham Townsend, Apple’s developer, who is in charge of engineers and specialists department, in his interview told that an iPnone’s camera consists of 200 separate parts. For creating a single image, 24 000 000 000 operations must be performed. That is why about 800 specialists were involved in the development of it.
For example, the group of engineers created the system, which steadies the effect of shaking hands during making a photo. Four 40-micron wires, what is twice thinner than a strand of human hair, are placed inside the camera: they help to smooth jitter.
One more example is the work of a special lab, which tests the process of taking photos in any type of lighting conditions and calibrates a camera for working in various environments.