Here is a video showing a breakdown of a lumix digital camera. (mikeselectricstuff/YouTube)
The amazing thing is how small the mechanical parts are, and how many there are in there. This camera probably costs no more than £200, yet there are minuscule parts and an amazing level of tiny details, all of which has to work reliably, without any maintenance, for a possible lifespan of several years.
The details of the lens assembly are particularly clever with multiple layers and motors which move the different parts. The coils which are printed onto the circuit board and form part of the movement mechanism is clever feature.