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The image sensor works like the film on
a normal camera. When the shutter is opened, light strikes the
sensor and a snapshot of the image is captured. There are two types
of image sensors. The more popular and used by most are the
charge-coupled device (CCD) due to its superior image quality. The
higher-end digital cameras will have two or three CCDs. The more
CCDs, the better it is. The second type is the complementary metal
oxide semi-conductor (CMOS) technology which is newer and cheaper to
produce compared to the CCD. The quality of the image may not be up
to par with the CCD but it is slowly getting there and has become
available in higher-end cameras. However, when choosing a digital
camera, it is advised to put quality of the lens ahead of the image
sensors because that will have a greater effect on the outcome of
the pictures. |