Owner's Manual

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Image Stabilizer Parallel Movement Principle
How do Canon IS Lenses repress blurring
caused
by camera shake?
Conon IS lenses detect camero shake with a pair
of buill-in gyro sensors, shifting lens components in
the direction of the vibration to counteract il and
prevent blurring. When the shutter button is pressed
halfway while the IS function is on, compensotion
for camero shake
is activated in just 0.5 seconds
Since the potential optical performance of the lens
is optimized, you can capture beautiful images.
How effective is the shake compensation
capability of Canon IS Lenses?
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EF-S15-85mm fI3.5-5.6 IS USM Image Slablllzer
Effect Graph
":It 85mm)
1180 \ll25{sec:j
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Generally, the shutter speed thol allows photographers 10 shool photos without blurring is ~ 1 /focallength
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Of course,
the foster the shutter speed, the greater the benefit in blur reduction. In comparison with lenses thot Jock an image
stabilizer, Conon IS lenses con achieve the some
blur-free clarity ot shutter speeds thai are 2 to 5 steps
(incrementsl slower, letls toke a look at on EF-S 15-
85mm f/3.5-56 IS USM lens, for e'omple. Since
the maximum focal length of this lens is effectively
136mm with comeros' like the EOS REBEL T2i/550D
and others thai feoture APS-C image sensors, Ihe
slowest shuller speed that could normally be used
while maintaining a blur-free image IS 1/125 sec
However, when the IS function is activated. the
shuHer speed con be reduced 4 Sleps 10 1/8 Sf'"
without blurring. Thus, you can shoot subjects or
slower shutter speeds without feor of blurred imoges
- dramatically expanding your range of shooting
situations and photo variations
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