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Today it is very easy and common to take pictures and send them through e-mails or mobile phones with the use of digital photography. Using digital cameras, you can see the photographs almost instantly with the LCD screens provided with them.
Also you can take large number of photos continuously until the memory is full. And we can easily erase them to take new pictures.
Overall you got more flexibility with the digital cameras compared to the conventional ones.
Also, the digital cameras sensitivity to light is almost 35 times that of a conventional camera.
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Kodak and Apple were the first ones to sell the digital cameras which can be used by general public.
Unlike the old conventional cameras, the images are recorded electronically in the digital camera. The digital image is a combination of 0s and 1s which represent the pixels.
Generally the digital cameras do not contain a film instead they contain a CCD (Charge-Coupled Device) for capturing the incoming light rays which are then converted to electrical signals.
A CCD is nothing but an integrated circuit with some semiconductor elements. The main component in this is a capacitor.
Using photoelectric effect, this CCD generates a pixel map based on the electric charge produced when the photons slam into the sensitive material.
When you take the photograph of an object using the digital camera, the light from that object zooms into the camera lens. This lens projects the image of the object onto CCD. This picture breaks into large number of pixels by hitting CCD.
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The details of each pixel like color and brightness are measured using CCD and are stored. Hence, the digital photograph stores all the information regarding each pixel in number format. All this information is stored in some sort of memory devices like flash memory card etc.
As the images are in the digital format, the digital photographs can be easily transferred to computers, phones and printers directly.
Even though the digital cameras have become extremely popular with more flexible features, they did not completely replaced the conventional cameras. The reason being that the film in the conventional cameras provides a better quality compared to digital cameras.
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