Parts of the
There are only
a few basic parts need to make a camera, and all cameras have
these with varying degrees of sophistication.
We need a light tight box or container. In the case of
the pinhole camera this could
be a simple box, or in the case of a manufactured camera
a compartment that is designed as an integral part of
the camera. |
We need somewhere to load the film. In the case of a simple
pinhole camera or this view
camera sheets of film are loaded separately, or as with
a 35mm camera the film comes in the form of a roll that
allows many shots. |
We need a lens that lets light onto the film in a controlled
manner. In the case of a simple pinhole
camera this is a tiny pin hole, or with most other
cameras this is a glass lens that redirects the rays of
light from the subject back to the film. |
We also need a means of controlling the length of time
the light reaches the film. In the case of a simple
pinhole camera this could be a piece of card we
remove from over the lens opening and then replace,
or with many modern cameras this is an electronic shutter
that controls this time in a very precise way to from
several seconds to thousandths of a second.
While we can take
photographs with a camera that has these few parts, we can also
add some refinements that will allow us more control over the
images we make.
the pinhole camera the size
of the pinhole governs the amount of light entering the
camera and apart from changing the pinhole we have no
control. A variable aperture
built into the lens will allow us to restrict the amount
of light entering the camera when there is a great deal
or open it up when there is very little.
there is no glass lens with the pinhole camera the image
has a sharpness that is equal across all subject distances.
If we add a means of focusing the glass
lens we can select the area we want in focus by changing
the distance of this to the film.
|6. With a
simple pinhole camera it is difficult to see what image
the camera is taking and it is a case of point and expose.
But with manufactured cameras there is usually a means of
lining the camera up with the view the photographer wants
to take. There are many systems of viewfinder from direct
vision to single lens reflex
viewing that allows the photographer to see exactly what
the camera sees.
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