Q: How does a digital camera work?
A: A digital camera has a lens and shutter, just like a film camera. Both types
of cameras use a metering device to determine the proper exposure needed
to record the image. A conventional camera records the image on film, which
needs to be processed in a lab before you see the results. The digital camera??™s
image sensor acts as the film, recording the information in digital format,
after which the image is transferred to the camera??™s storage device. With the
exception of the RAW format, the picture is processed in the camera, and you
see the results almost immediately on the camera??™s LCD monitor. If you shoot
using your camera??™s RAW format, the LCD monitor displays an image of what
the camera recorded.
Q: What is an image sensor?
A: The image sensor records images by converting light signals to electrical
signals, which is then processed by your camera and stored in digital form.
Digital cameras use two kinds of image sensors: CCD (charge coupled device)
or CMOS (complementary metal oxide semiconductor). CMOS sensors are
thinner and can accommodate additional circuitry for features such as image
stabilization and dust removal. They also consume less battery power than
CCDs.
Pages:
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47