The
basic technology that makes all of this possible is fairly simple. A still film
camera is made of three basic elements: an optical element (the lens), a
chemical element (the film) and a mechanical element (the camera body itself).
As we'll see, the only trick to photography is calibrating and combining these
elements in such a way that the recorda crisp, recognizable image.
The
optical component of the camera is the lens. At its simplest, a lens is just a curved
piece of glass or plastic. Its job is to take the beams of light bouncing off
of an object and redirect them so they come together to form a real image -- an image that looks
just like the scene in front of the lens.
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