Owner's Manual

@l Ccrnero shake _
IS
camera
camera
causes it
Image Sta;'iII';'~ Pa,allel Mo';"ment P;i~~IPle I
i. Lens When still
Focal plane
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Canon IS Lenses detect camera shake with a pair
of built-in gyro sensors, shifting lens components in
the
direction of the vibration to counteract it and
prevent blurring. When the shutter button is pressed
halfway while the IS function is on, compensation
for camera shake is activated in just 0.5 seconds.
Since the potential optical performance
of the lens
is optimized, you can capture beautiful images.
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 smail 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.
I
~ Image Stabilizer can be used within 0.5 sec. I
after you press the shutler button halfway.
• To avoid camera shake, the general rule is to use a shutler speed .
tlla! is the reciprocal of lhe focal length (1/focallength x 1.6). !
• There will be a 90% or higher chance of the shot not being blurred by camera shake. I
Image Stabilizer ON
50
r-"~';~~'~';=~~mm f/4-5.6IS USM Image ~tabiliZ~~"'"
I Effect Graph (f ::: 85mm)
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Image Stabilizer ,/
OFF /
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iia 1/15 1/30 1/60 11125 (sec)
Generally, the shutter speed that allows photographers to shoot photos without blurring is "1 /focal iength
H
•
of course,
the faster the shutter speed, the greater the benefit in blur reduction. In comparison with lenses that lack an image
stabilizer
i
Canon is Lenses can achieve the same
blur-free clarify at shutter speeds that are 2 to 3 stops
(increments) slower. Lers take a look at an U-S 17-
85mm f/4-5.6 IS USM lens, for example. Since the
maximum focal length of this lens is effectively
136mm with cameras* like the EOS Digital Rebel XT
I EOS 350D Digital and others that feature APS·C
image sensors, the slowest shutter speed that could
normally be used while maintaining a blur-free
image is 1/1 25 sec. However, when the IS function
is activated, the shutter speed can be reduced 3
stops to 1/15 sec. without blurring. Thus, you can
shoot subiects at slower shurter speeds without fear
of blurred images - dramatically expanding your
range of shooting situations and photo variations.
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, Ws inconvenient to
corry 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, Conon IS Lenses are the
definitive solution to blurring problems.
Just a single IS lens con help you capture images in a
natural light, without other equipment
or special set-up, wherever and whenever you want.
I 19 I
* ECS 20[) reos 20Da, [OS Oi9,IOI ReD'';, Xi ! f::OS 350D Dig;;,,,, reos Digiici Rebel/EO:; 3000 Digix;i I 20 I