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How does a
camera work?
The basic
principle of a camera is quite straight forward.
Light enters a box through an opening and an image
is focused on the side opposite the hole where the
light is.
Most cameras have
a lens or several lenses at the hole in which light
enters. The focused image then falls on the back on
the camera. Traditionally this was a light
sensitive film that would react to light. A
chemical reaction occurs on the film and it changes
the film depending on what light/colours/intensity
hit it.
The above diagram shows how light
rays from an object are bent by a lens and form an
upside image and focus the image onto the inside of
the camera.
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Types of
Cameras
There are
approximately 3 different types of cameras.
- Pinhole
camera
- Single lens
camera
- Single lens
reflex camera
They can also be
classified as
- View
finder
- Range
finder
- Twin lens
reflex
- Single lens
reflex
Reference: SCphoto.com
Choosing a
camera
Choosing a camera
really depends on the kind of photography you are
interested in and the sorts of things you want to
photograph.
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What
kinds of photos you want to
take
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Suggested Type of
Camera
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family
pics, spontaneous shots.
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small
compact
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close-up
photos
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a camera
with Macro lens
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artistic
shots with a wide range of depth of
field
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an SLR
camera
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magazine/large
landscapes
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a medium
format camera
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wildlife, animals,
birds
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an SLR
Camera
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There are also
digital cameras but this really is referring to the
replacement of film. There are some differences in
lenses and focal lengths in digital cameras but
this is due to the different size of the area where
the light falls on to. Digital cameras typically
have a smaller sensor than the area taken up by
standard film.
see
luminous-landscape for more details
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