The Canon EF S 17 55mm f2 8 IS USM Lens is a superb, top quality lens that is primarily designed for the EF-S zoom lens range, though the image quality is so good that some have likened it to being on par with that of the renowned and highly regarded Canon L series range.

The main reason behind this is a big circular aperture that produces a shallow depth of field and high quality low dispersion aspherical lens elements that ensure you have outstanding image quality across the entire zoom range.

This lens also has another crucial and equally as impressive feature - image stabilization. This means that the camera can accommodate for camera shake under many situation, allowing you to shoot in low light more regularly and with more confidence that your images will still be of the greatest quality.

Furthermore, the EF S 17 55 f 2.8 IS USM features an easy to use, ring-type ultra-sonic motor and an extremely fast and intuitive auto focus system, that is a real pleasure to use.

Product specs and significant 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 ft) to 27 degrees (at 50 feet)

Focus adjustment: AF with full-time 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 in. long

Weight: 22.8 ounces

There is 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's no other lens on the market at present that gives you the ideal combination of a useful zoom range, aesthetically pleasing depth of field, image stabilization and to top it off a very fast and very precise auto focus.

As if that wasn't enough, the image quality rivals that of lenses costing some thousands of dollars and should not be overlooked as your next lens selection or simply an upgrade to the popular but basic EF-S 18-55 millimeters kit lens.

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