Canon EF-S 17-55mm f/2.8 IS USM Zoom Lens

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Engineered Specifically for EF-s
Digital SLR APS-C Cameras

Canon EF-S 17-55mm f/2.8 IS USM LensThe Canon EF-S 17-55mm f/2.8 USM IS may not be a flawless lens but it keeps up with the Canon users very high expectations. The resolution numbers are rated right up there with the absolute best for being an APS-C normal zoom lens. The resolution in the center is generally right on even mounted on the Canon 50D while the borders stay an exceptional quality level.

The deformation traits are quite normal for a zoom in this reach (somewhat prominent barrel deformation @ 17mm, restrained pincushion deformation @ 55mm) although lateral CAs are untypically restrained. Vignetting although unfortunate is a problem at f/2.8 and the bokeh quality (portrayal of the out-of-focus blur) is lacking in significance when in in critical circumstances. The len's build quality darn good but there's too much plastic for its price tag. Even the much less expensive EF 70-200mm f/4 USM L sports a magnesium-alloy outer shell. All told the 17-55 is obviously a step up from other standard Canon zoom lenses although a pricey one.

Aspherical and AD elements provide imposing image quality throughout the entire zoom range, Large circular aperture delivers a shallow field depth; ring-style ultra-sonic motor (USM) mage stabilizing lens groups move to counterweigh any picture shake even in poor lighting Ir measures just 3.3 inches around, 4.4 inches in length and; weighs only 22.8 ounces.

It's a large-aperture lens engineered specifically for EF-s digital SLR APS-C cameras, and provides a super wide to short tele-zoom ratio, containing in-lens Image Stabilization. Its focal length is a 35mm film equivalent approx. 27-88mm. It features the latest Canon optical Image Stabilizer engineering, offering up to 3-stops image blur compensation created by slow shutter speeds and camera shake to ensure crisp. clear images, even in poor light.

Specifically designed for digital photography, it has lens elements that are especially shaped and has what Canon calls Super Spectra coatings for suppressing flare and ghosting, which are often caused by reflections coming off the camera's digital sensors. Note: Canon Extension Tubes EF 12 II and EF 25 II only mount on this lens. Note! Lens not appropriate for 35mm SLR film cameras or digital SLR camera featuring image sensors larger than APS-C, only fits on EOS Digital Rebel cameras or Canon 20D, 30D, 40D and 50D, DSLR cameras ✓

Lens Includes

77mm Snap-On Lens Cap
Lens Dust Cap E (Rear)
1-Year Warranty

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Lens styleZoom lens  
Max Format Size APS-C / DX  
Lens focal length17 55 mm  
Stabilization type Yes (3 stops)  
Camera mount Canon EF-S  
Angle of view 7830' - 2750'  
Aperture (lens diaphragm)
Largest aperture opening F2.8  
Smallest aperture opening F22.0  
Includes aperture ring No  
Total diaphragm blades 7  
Aperture annotations Circular aperture  
Total Elements 19  
Number of Groups 12  
Coatings / special elements Super Spectra coatings  
Minimum focus distance 0.35 m (13.78")  
Maximum magnification ratio 0.17 x  
Autofocus type Yes  
Lens motor Ring-type ultrasonic  
Full time manual focus Yes  
Focusing method Internal  
Lens distance scale Yes  
Depth of field scale Yes  
Physical features
Overall weight645 g (1.42 lb)  
Lens diameter 84 mm (3.29")  
Overall length 111 mm (4.35")  
Construction materials Plastic barrel, metal mount  
Sealing No  
Lens color Black  
Zooming method Rotary (internal)  
Power zoom No  
Zoom lock switch No  
Filter thread size 77 mm  
Lens hood included No  
Lens hood code EW-83J  
Tripod collar included No  
Optional accessories Soft Case LP1219


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