Effects Of Changing The Shutter Speed; And The Aperture - Canon AT-1 Instructions Manual

Concerning the Exposure (Shutter
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.
Speed and Aperture Coupling)
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In order to obtain the correct exposure, it
is
necessary to correctly match the shutter
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speed with the aperture. The shutter speed
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and the aperture are the main factors in
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controlling the amount of light which
is
allowed to strike the film, and when they
change, the quality of the image upon the film
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also changes.
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Effects of
Changing the Shutter Speed
The explanations below are pertinent t o
photography with fast moving subjects or
when it is intended to produce impressionistic
pictures of movement. Depending on the
selection of the shutter speed, you can freely
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T
control the expression of movement.
If, a s in example A, the photo is taken at
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-
. -
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. ,
a shutter speed of 1 /I000 sec., the movement
will be frozen. If, as in example 6, with the
same subject, the photo is taken at a shutter
speed of 1/60 sec. with a panning technique,
the movement
is
well expressed.
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Panning is really quite a simple technique.
Hold the camera firmly and continue twisting
the upper part of your body while following
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