http://www.usa.canon.com/cusa/consumer/products/cameras/ef_lens_lineup/ef_s_17_55_f_2_8_is_usm?pageKeyCode=writeReviewPage
EF-S 17-55 f/2.8 IS USM
12955

Specifications
Main Unit Spec
| Focal Length & Maximum Aperture | 17-55mm 1:2.8 |
| Lens Construction | 19 elements in 12 groups |
| Diagonal Angle of View | 78°30' - 27°50' |
| Focus Adjustment | AF with full-time manual |
| Closest Focusing Distance | 1.15 ft. / 0.35m |
| Zoom System | 5-group helical zoom (front group moves: 27mm) |
| Filter Size | 77mm |
| Max. Diameter x Length, Weight | 3.3 in. x 4.4 in., 22.8 oz. / 83.5mm x 110.6mm, 645g (lens only) |
| Hood: EW-83J (bayonet, petal form, two-claw removable hood; attachable in reverse) |
EF-S 17-55 f/2.8 IS USM
4.3
5
48
49
Badass but dusty
This lens is really great, it's super fast and quiet even in low lighting. Portrait are beautiful less noise then my old lens. I fell in love with this lens after upgrading it from my EF-S 18-200mm f/3.5-5.6 IS. It doesn't have the zoom range as the EF-S 18-200mm and a lock, but it's lighter. The build quality is bit similar. The EF-s15-55 get really dusty inside easily and fast though which I don't like. I would love to see an update of this lens.
L build quality.
Longer zoom.
Lock
EF 24-70mm f/2.8L II USM & EF24-70mm f/4L IS USM Features.
April 8, 2013
Outstanding Lens
I read all the negative on this lens but after carefully weighing my options, I purchased it and I have to say, I'm happy I did.
Let me say first that it should be obvious that any zoom lens will have dust issues as they get older. Pumping the focal length in and out will carry dust into the lens body. It's cant be helped. If there was some unfortunate folks that got a lens that didn't live up to the Canon name, well that's why we buy from reputable sources, warranties.
All and all I'm ultra pleased with this lens, wishing there were more constant aperture, internal focus , fast lenses in the line up.
April 6, 2013
Good Buy
Having used this lens for over a year as a primary go to lens
I find that it has it's place . i also own the 70-200mm f2,8is mk 1
i use this lens every chance i can. you have to compare apples for apples... the dif in a L lens well what can you say it's a L lens ....that being said this lens has nice weight and balance the manual focus ring is quite sensitive but after repeated use its managable The auto focus is fast enough to perform as built.
i use this for weddings , events , portriats product and it always serprises me when i see my images on screen . the color capturing of this lens is wounderfull. I am never left without enough color detail . because of the light weight, operating without (IS) you have to really look very very hard to even notice any camera shake .which helps a lot in very dim light arenas Somtimes the focal point would fool you but that could user error at times . for the money if canon would just make it water resistant give the focus ring a do over like adding just a tweek of resistance this lens would feel more expensive and make you feel good with the cold cash your layin down ..
although i would love a 24 - 70 mk2 and its fabulas glass for another k which also is in another class , useing this on the my 7d's with it's crop sensor give 's an equal range in those tight locations . I just love my 70-200mm which is in a whole nother class also . for the money, the wounderfull color in the images , and features. if you own a crop sensor camera this lens needs to be in the top five lenes in your bag
October 5, 2012
Excellent carry around lens with sharp picture and fast focus. IS is excellent and probably the only f2.8 lens in this range. Dust creeping into the lens is an issue though and needs to be watched carefully.
September 16, 2012
