The Canon EF-S 18-55mm IS lens adds image stabilization to the company's older kit lens, though otherwise it and its predecessor are basically the same. It's compatible with all Canon EF-S digital camera bodies, such as the EOS Rebel XSi and EOS 40D, but it won't fit on the EOS 5D or any cameras in the EOS 1D or 1Ds series. For less than $200, it's a very affordable image-stabilized lens, particularly when you consider that Canon's EF-S 17-55mm F2.8 IS lens sells for more than $900. While this model is currently shipping as a kit lens for the EOS Digital Rebel XSi, you can also buy it separately. Its wide to medium zoom range, compact size, light weight, and image stabilization make it great for travel, and general purpose photography.
While the plastic construction of the lens barrel and lens mount make the lens lightweight (7.1 ounces), better-built lenses have a metal lens mount and even a metal lens barrel for durability.
Has a working focal length of 29-88mm on a Canon EF-S body such as the EOS Rebel XSi or the EOS 40D (because of the camera's smaller sensor size there's a 1.6x magnification factor).
Offers a variable maximum aperture from f3.5 to f5.6, and a variable minimum aperture from f22 to f38.
Measures 3 inches long with a 2.7 inch diameter, and accepts 58mm screw-on filters.
Knurled wide rubber zoom ring, with a small focus ring at the very front of the lens barrel.