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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.

*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.

¡“IS” stands for Image Stabilizer. ¡“USM” stands for Ultrasonic Motor.

Conventions used in this instruction

Warning to prevent lens or camera malfunction or damage.

Supplementary notes on using the lens and taking pictures.

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).

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