The Canon EF-S 55-250mm f/4-5.6 IS Lens is a small, light and economical telephoto zoom with a long focal length range - one that matches up very well to many general purpose zoom lenses. As it is an "EF-S" lens, the Canon EF-S 55-250mm f/4-5.6 IS Lens can only be mounted on Canon APS-C/1.6x FOVCF bodies. This is the first EF-S lens longer than 85mm and the first released since the Canon EF-S 18-55mm IS Kit Lens - a lens that the EF-S 55-250mm complements especially well.This telephoto zoom lens is designed with Canon's Optical Image Stabilizer technology while retaining compactness and lightness, in response to demands of photographers.
This high zoom ratio lens is equivalent to a focal length of 88-400mm in the 35mm format (when used on Canon EOS cameras compatible with EF-S lenses) and the image stabilizer effect equivalent to a shutter speed about 4 stops faster than the same size lens without Image Stabilizer.
In other words, if the slowest shutter speed you could formerly hold a 250mm lens steadily was 1/250th of a second, with Canon's 4-stop stabilization correction, you could hand-hold at shutter speeds as slow as 1/15th of a second. It also uses a UD-glass lens element to correct chromatic aberration for excellent image quality throughout the zoom range.
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