All cameras contain the
same basic components, move your cursor over the links below to see how
these components fit together.
The lens focuses the light rays from
the subject and creates a reversed, upside down image on the film at the
back of the camera. The lens is moved back and forth to create a sharp
image on the film. The focal length of the lens influences the Depth
of Field and Perspective.
Please refer to Focusing
Light for more information.
The amount of light reaching the film
plane is controlled by the aperture. Normally an iris diaphragm is used
to vary the diameter of the aperture, the settings are called f stops.
The aperture also influences the Depth
of Field. Please refer to Controlling
Image Exposure for more information.
The shutter can be set at different
speeds to determine the length of time the film is exposed. Focal plane
shutters consist of two metal blinds that open progressively. Leaf shutters
are located closer to the lens, the blades spring open. Please refer to
the Image for more information.
The film records the subject image
on its light sensitive surface. The film can be either chemical or digital.
A transport mechanism is required to replace exposed film with unexposed
film. With digital cameras the image must be converted and stored before
the next picture can be taken. Please refer to Chemical
Image Processing and Digital
Image Processing for more information.
The light tight body houses the various
components of the camera, the shape of the body is influenced by the type
of viewing system. The ) camera shows the scene through the viewing lens until
the shutter is released. While the
camera has a separate viewing lens, the subject can be seen even when the
shutter is released. Please refer to Camera
Types for more information.
Next Camera Section