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Thank you for purchasing a Canon product.
The Canon EF-S17-55mm f/2.8 IS USM lens is
a large-aperture, high-performance standard
zoom lens equipped with an Image Stabilizer.
It has been developed for EOS cameras*
compatible with EF-S lenses.
¡“IS” stands for Image Stabilizer.
¡“USM” stands for Ultrasonic Motor.
Features
1. The Image Stabilizer gives the equivalent
effect of a shutter speed three stops faster*.
2. Aspheric and UD lens elements for excellent
imaging performance with a large f/2.8
aperture.
3. Ultrasonic motor (USM) for quick and quiet
autofocusing.
4. Manual focusing is available after the subject
comes into focus in autofocus mode (ONE
SHOT AF).
5. A truly round aperture hole results in a nicer
background blur.
* Based on [1/(focal length x 1.6)] second. Generally,
it requires a shutter speed [1/focal length] second or
faster to prevent camera shake (in 35mm format.
With an EF-S lens, it would be [1/(focal length x
1.6)] second).
Conventions used in this instruction
Warning to prevent lens or camera
malfunction or damage.
Supplementary notes on using the lens
and taking pictures.
*
As of February 2010, only the EOS 7D, EOS 50D,
EOS 40D, EOS 30D, EOS 20D, EOS 20Da, EOS
REBEL T2i/550D, EOS REBEL T1i/500D, EOS
REBEL XSi/450D, EOS REBEL XS/1000D, EOS
DIGITAL REBEL XTi/400D DIGITAL, EOS
DIGITAL REBEL XT/350D DIGITAL, and EOS
DIGITAL REBEL/300D DIGITAL are compatible
with EF-S lenses.
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