Canon EOD 50D Instruction Manual page 270

IS
benefits
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I 19 I
When does camera shake tend to happen,
and what causes it to occur?
Perhaps you've encountered blurred images when enlarging pictures: photos that look fine in
smaller postcard sizes appear quite fuzzy at greater size. In fact, camera shake happens more
frequently than you'd think. There are several reasons for accidental blurring. One cause is the use
of a telephoto lens, which lets you shoot small subjects at higher magnification, and also turns small
vibrations during shooting into heavy blurring of images. Another cause is shooting in dark places.
When taking pictures at lower shutter speeds, in an unsteady posture, or on an unstable platform
such as a train or a boat, blurring is quite common.
How can you best protect your pictures
from camera shake and blurring?
The most certain way to prevent camera shake is the use of a tripod. Additionally, use
of
flash can
effectively minimize blurring when shooting in low lighting conditions. However, it's inconvenient to
carry around a heavy, bulky tripod, and in some places, tripod use isn't even allowed. What's
more, the use of a flash may sometimes spoil the mood of a shooting scene by disrupting the
natural lighting nuances of the atmosphere. In any of these situations, Canon IS Lenses are the
definitive solution to blurring problems. Just a single IS Lens can help you capture images in a
natural light, without other equipment or special set-up, wherever and whenever you want.