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The Canon EF S 17 55mm f2 8 IS USM Lens is a superb, high quality lens that's primarily designed for the EF-S zoom lens range, although the image quality is very good that some have compared it to being on par with that of the admired and highly regarded Canon L series range.

The main reason behind this is a large round aperture that produces a shallow depth of field and high quality low dispersion aspherical lens elements that make sure you get superior image quality across the entire zoom range.

This lens also has another important and equally as extraordinary feature - image stabilization. This means that the camera can accommodate for camera shake under certain conditions, enabling you to shoot in low light more regularly and with more confidence that your images will still be of the best quality.

Additionally, the EF S 17 55 f 2.8 IS USM features an easy to use, ring-type ultra-sonic motor and a very quick and user-friendly auto focus system, that is a real pleasure to use.

Product specifications and crucial data:

Focal length: 17-55 mm

Maximum aperture: f/2.8

Lens construction: 19 elements in 12 groups

Diagonal angle of view: 78 degrees (at 30 feet) to 27 degrees (at 50 ft)

Focus adjustment: AF with fulltime manual

Closest focusing distance: 1.15 feet

Zoom system: 5-group helical zoom (front group moves 27 millimeters)

Filter size: 77mm

Dimensions: 3.3 inches in diameter, 4.4 inches long

Weight: 22.8 ounces

There's no doubt that the Canon EF S 17 55mm f2 8 IS USM is one wonderful lens. As far as 1.6x crop lenses go there is simply no other lens available these days that gives you the ideal combination of a workable zoom range, aesthetically nice depth of field, image stabilization and to top it off a very fast and very accurate auto focus.

As if that was not sufficient, the image quality rivals that of lenses costing some thousands of dollars and should not be overlooked as your next lens choice or just an upgrade to the popular but basic EF-S 18-55 mm kit lens.

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