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Digital cameras were an improvement on the cumbersome film based cameras which were in use earlier. The basic technology behind the digital camera is a program and a light sensitive device. This light sensor is normally a CCD or Charge Coupled Device and the circuit board of the digital camera contains the program as firmware. The program is basically a simple piece of code similar to the ones that make microwaves or washing machines work.

Instead of the CCD a Complementary Metal Oxide Semiconductor or CMOS can be used as the primary light sensor. The basic principles of operation of the two devices are the same. The CCD is made up of many light sensitive elements. These elements covert light into electrical energy, with more electrical energy produced in areas where the intensity of light is greater. Read more at Canon EOS 5D Mark III review

We can think of these elements as minute squares. Depending on the intensity and brightness of the light falling on the square, it produces a unique charge. Each of these square elements produces different electrical charges which are then carried by the electrical circuits to the location of the firmware. The firmware is configured such that it can interpret the variations in electrical charges produced by individual square elements.

The integrated firmware identifies the specific features of each charge and relates this information to aspects like color, contrast and brightness. This interpretation process is carried out for all individual elements of the CCD and the information obtained is put together to give you a complete photograph. The method involved in putting these details together is similar to the technique employed in televisions or computer monitors.

The picture is generated as a sequence of pixels, with each individual pixel consisting of three main colors. The Bayer Filter technique is used to vary these three colors to produce a variety of shades. Generally green may dominate among the three colors since the human eye is less sensitive to green compared to blue or red.

The firmware is responsible for digitization of the image. It produces a digital code which records the pictorial information. This digital code can be used to reproduce the recorded picture multiple times. This code can be transferred to the camera screen or other devices for hassle free viewing. Find the best deals at digital cameras for sale .This is a basic description of how digital cameras work.

The basic principle used is the conversion of light to electrical energy. The individual elements of the CCD light sensor produce electrical impulses when exposed to light. These impulses are routed through the electrical circuitry and reach the circuit board of the camera. The circuit board of the camera contains the firmware responsible for digital encoding of the electric charges received. The firmware successfully authors a digital code which can be used to produce a detailed photograph.

The firmware programming nowadays includes code for image stabilization and other processing techniques which give you the best quality pictures possible. Since the photograph taken is basically in digital form it is easy to transfer and print. It successfully eliminates the need for long rolls of films and difficult processing mechanisms.