The pictures illustrate how a digital camera functions.
Overall, the design of the digital camera is complicated with capturing components and a processing system. The device relies on the movement of a reflect mirror through a shutter on the top for taking photos.
Looking at the pictures in more detail, when the shutter is released, the light goes through a lens section with different sizes to the reflect mirror that covers the CMOS sensor. The light is then reflected to the top of the camera and reachs a penta-mirror. Consequently, it follows a path that leads to human eyes, so that the photographers can see the scence that they will capture.
With regard to the way to take a photo, the shutter is touched, resulting in the reflect mirror being moved upwards. At that time, the light reachs the CMOS sensor instead and is transferred to a CPU for processing before being displayed on a LCD screen outside. Meanwhile, the captured data is also store in a memory card featuring inside the camera.