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Start Shopping  How Does a Digital Camera Work?  A common
misconception surrounds today’s digital cameras: Because these
cameras don’t use film and because they produce pictures as data
files, many folks think that digital cameras must use a
radically different method of capturing images. Actually, your
family film camera and that power-hungry, battery-munching
digital camera you got for Christmas are remarkably similar in
most respects.  A film camera has a shutter that opens for a set
amount of time (usually a fraction of a second), admitting light
into the body of the camera through at least one lens. (Of
course, that lens can be adjusted to bring other objects at
other distances into focus, or different lenses can be tacked
on.)   As the figure illustrates (up to this point, anyway),
your film camera and its digital br