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The Learning Curve
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The Learning Curve (Weird Science, 1996).iso
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expmodes.txt
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1996-06-14
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EXPOSURE MODES
Most modern cameras, especially SLR's, have a whole range of
exposure modes to select. Some have a number of pre-programmed
settings for, for example, sport, where continuous wind and
autofocus are selected at the touch of a button. Here are some of
the more usual ones....
MANUAL - Speaks for itself, really. The metering system will
usually indicate a recommended exposure, which can be used or
modified as desired. The camera can be used as a hand meter, in
this mode, and will be of more use to the experienced in
difficult conditions.
APERTURE PRIORITY - The user sets the desired aperture on the
camera using the required metering mode. The camera chooses the
shutter speed for correct exposure. Remember, the speed must be
fast enough to avoid camera shake - some cameras don't warn you.
SHUTTER PRIORITY - The opposite of aperture priority ! Allows
control of the freezing action of high shutter speeds, or the
choice of depth of field. In many systems, the camera will over
ride the photographers settings if they fall outside certain
preset limits although this is usually an extra setting - you may
not want the camera to over ride.
PROGRAM - All sorts of systems here, from the camera using a
simple basic set of rules, to 'telephoto' programs that always
try and set fast shutter speeds, or 'depth' versions that go for
small apertures. Some systems have 'shift' facilities which allow
the user to move the program up or down whilst still looking
through the viewfinder.
DEPTH - A program available in some autofocus cameras. The user
focuses on a near, then a far point - or vice versa - the camera
then selects a shutter speed/aperture combination that will, if
possible, get everything BETWEEN these two points sharp. CARE - a
tripod may be needed - the shutter speed may be very slow.