A digital camera focuses light through a lens onto a sensor, that records images electronically. This electronic information is then converted into binary digital data, and stored on a fixed or a removable device for being read by a computer. Below is a more outlined way of understanding how digital cameras work.
1. The CCD
In practice, most digital cameras use a charge coupled device (CCD) as an image sensor. Some digital cameras use a complimentary metal oxide semiconductor (CMOS) instead. Both these sensors convert light into electrical charges, that are transferred to a storage disc. The sensors also filter the light into the three primary colors and then combine them to create the full spectrum. The more expensive cameras use three sensors. Each of them has a filter of a different color.
2. Light Control
Aperture and shutter speed is used to control the amount of light that reaches the sensor. The aperture setting is automatic in most digital cameras. Some cameras also allow manual control, for professionals and enthusiasts. The shutter, in contrast, is set electronically.
The digital cameras use four kinds of lenses....