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Digital Camera For Sale
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Before
you buy a digital camera, here some tips to get a good
one:
The quality of a digital camera is mainly defined by four
quantities: resolution, lens aperture, lens zoom range,
lens quality, and software. CCD sensitivity also varies
somewhat
Resolution:
Nearly
all digital cameras use CCD's as the sensing element.
This is what takes the place of film. The resolution is
the number of pixels in the captured image. Computer images
are divided into little dots called pixels. The more pixels,
the more detailed the image can be. |
Lens aperture: The
aperture of a lens is its maximum opening. The bigger the aperture,
the more light is gathered, and the less light you need to take
a good photo.
Lens zoom range:
A zoom lens has a variable focal length. The focal length determines
the magnification of the lens. A short focal length is a wide-angle
lens, great for taking in large vistas. A long focal length is
a telephoto lens, allowing you to get a tight photo of a distant
object or person.
Lens quality:
Lenses with the same focal length and aperture can differ substantially
in quality. A poor lens is not as sharp, and it may exhibit chromatic
aberration, which means that all colors are not brought to the
same focus.
Media
type: Most digital cameras use CompactFlash or Secure
Digital.
Brand recommendations:
Olympus, Nikon, Canon. These companies have along history of
making fine 35 mm cameras and lenses. Fuji. When someone asks
about the best cameras under $300.
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