| Did You know
how a digital camera works?
A
digital camera is an electronic device used to capture and
store photographs electronically in a digital format. In
digital cameras the light sensitive medium is a silicon chip
covered with a regular pattern of very small light sensitive
circuits. When a few photons hits one of these it causes a
few electrons to flow in a circuit. These electrical signals
are then amplified and converted into a digital format.
Each cell in most sensors is covered by a red, green or
blue filter (RGB), so that only light of that color can
reach it. The 'raw' image that contains the digital values
for these separate RGB sites is then mathematically
converted into pixels values for red, green and blue at a
particular point.
Lens quality also has an important influence on the image
quality - there is little point in having a high resolution
digital conversion of an unsharp optical image. Lens quality
can only really be assessed by practical tests, but the
better known camera and lens makers can generally be relied
on to produce good quality.
Most digital cameras use memory cards of one kind or
another to store the images you take. These can be taken out
of the camera and replaced by other cards. Several different
card types are in use and are not interchangeable.
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