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Digital Camera Basics |
What is ISO speed or Sensitivity?
This setting has been adopted from film cameras. Higher ISO speeds are needed to take
pictures in worse lighting conditions, however they also cause an
increased amount of noise. Digital cameras also come with different ISOs. The
higher the speed, the more sensitive the film is to light so 100 speed
film is good for outdoor shots, but 400 film is better for indoor
shots. Faster film is also needed to capture quick motion shots.
Exactly the same considerations go into choosing the ISO of a digital
camera. Think about the light conditions and type of subjects you plan
to shoot and pick an ISO accordingly. Typically 100, 200 and 400.
What is lens aperture?
Lens aperture or the f-number is the ratio of the focal length of
the lens to the diameter of the light rays passing through the aperture
in the iris diaphragm. Smaller numbers represent bigger openings and
allow more light to pass through.
What is shutter speed?
Shutter speed is the amount of time the shutter allows light onto
the CCD or film. The shutter speed is measured in seconds. The slower the shutter speed, the
more motion is recorded by the camera. A tripod is needed to use
slower shutter speeds without blurring the picture.
LCD Viewfinders
Most digital cameras are equipped with a liquid-crystal display (LCD)
viewfinder that allows you to see what your picture will look like
before you take it. LCD viewfinders also permit you to view saved
images and delete the ones that you don't like
Macro Mode
To take extreme close-ups like photographing a stamp, coin
collection or flower. A macro lens can
act as a normal lens but also lets you focus on an object as close as 3
cm. Macro mode works best from 10-30 cm.
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