A tremendously flexible standard zoom for APS-C-format DSLRs, the EF-S 17-55mm f/2.8 IS USM from Canon pairs the 27.2-88mm equivalent focal length range with a bright f/2.8 constant maximum aperture. Benefitting this design is a sophisticated optical layout, which includes both Ultra-Low Dispersion glass and aspherical elements to significantly reduce chromatic and spherical aberrations for improved clarity and sharpness throughout the zoom range. A Super Spectra coating has also been applied to individual elements to suppress flare and ghosting for increased contrast when working in bright environments.

Beyond the optical attributes, this 17-55mm is also characterized by its advanced three stop-effective Image Stabilizer system to minimize the appearance of camera shake. Also complementing handling is a sophisticated ring-type USM, which provides quick, quiet, and accurate autofocus performance along with full-time manual focus override.

EF-S-Mount Lens/APS-C Format    27.2-88mm (35mm Equivalent)    Aperture Range: f/2.8 to f/22    Two UD and Three Aspherical Elements    Super Spectra Coating    Ring-Type Ultrasonic Motor AF System    Optical Image Stabilizer    Rounded 7-Blade Diaphragm

Versatile wide-angle to portrait-length zoom is designed for APS-C-format Canon EF-S-mount DSLRs and offers a 27.2-88mm equivalent focal length range.

Bright constant f/2.8 maximum aperture affords consistent illumination throughout the zoom range and also affords greater control over depth of field for working with selective focus techniques.

Two Ultra-Low Dispersion glass elements noticeably reduce color fringing and chromatic aberrations for high clarity and color fidelity.

Three aspherical elements minimize spherical aberrations and distortions for improved sharpness and accurate rendering.

Super Spectra coating has been applied to individual elements to minimize ghosting and flare for greater contrast and color neutrality when working in strong lighting conditions.

An Optical Image Stabilizer helps to minimize the appearance of camera shake by up to three shutter speed stops to better enable working in low-light conditions and with slower shutter speeds.

A ring-type Ultrasonic Motor (USM), along with an internal focusing design and optimized focusing algorithms, is employed to deliver fast, precise, and quiet autofocus performance as well as full-time manual focus override.

Rounded seven-blade diaphragm contributes to a pleasing out of focus quality that benefits the use of shallow depth of field and selective focus techniques.

Related Questions and Answers

Q: 1. Being that this is for an apsc camera, does that mean that it is 17-55 and not multiplied by the 1.6x crop factor. Ik that with full frame lenses it is, but being that this is for an apsc I'm just confirming that it is true 17-55

A: Whether this is an aps-c lens or full frame, you still have to do the math on a cropped sensor camera. You will always have to do the magnification factor with any lens, for example 17-55mm x1.5 crop factor.

Q: 2. What would this lens be best used for in photography?

A: Because of the large opening of the lens 2.8, I bought it to use at stage plays that my daughter and grandson appear in. It works perfectly, to ensure the sharpness of the image, I have to jack up the ISO on my 7D Mark II. Great lens.

Q: 3. How many stops of image stabilization?

A: This lens has about 3 stops of stabilization.

Q: 4. I have 77D,kit lenses 18-55,55-250,50 mm prime,tamron 16-300 ,would this lens be worth buying?

A: The Canon EF-S 17-55mm f/2.8 IS USM Lens is a good lens for you to add to your collection if you are shooting in low light.

Q: 5. I read in an internet thread that the 80D has focus issues with this lens. Has anybody faced problems with this lens and the 80D?

A: In reading the reports, we would say that the issue either is a maladjusted new lens or a used one in need of adjustment. While we caution everyone to test their new camera vigorously, actual problems with any new camera and new lens is very rare. We see no red flags for buying this combination.

Q: 6. Will this Lens work on a Canon EOS Rebel T1i / EOS 500D?

A: Yes.

Q: 7. Is this lens compatible with the Canon 1 D Mark 4?

A: No. The 1D Mark IV does not support EF-S lenses. You'll need an EF mount lens.

Q: 8. Is this lens compatible with Canon 40D and or 6D? I currently have a 40D and thinking of upgrading to 6D soon. Thanks

A: This lens will work well on the 40D, but will vignette on the 6D. This is due to the smaller APS-C-specific image circle found on the lens. If you are going to be upgrading to a full frame camera, an EF lens would be necessary (as opposed to an EF-S, which will not work):Canon EF 24-105mm f/4L IS USM LensB&H # CA241054LIS ? Mfr # 0344B002This is a compatible lens in roughly the same focal and price range.

Q: 9. Is this the 2nd version of this lens? Or is there only one version? Anyone know when or if another version will be made or released?

A: From what I am finding, there has only been one version of the Canon EF-S 17-55mm f/2.8 lens. I havent seen an announcement from Canon about a new version of this lens, so wouldnt be able to say if they plan on releasing one anytime soon.

Q: 10. Will this lens work with MFT mount?

A: This is a Canon EF mount lens and is not natively compatible with a Micro Four Thirds camera. However, you can use this lens on a Micro Four Thirds camera with the use of an adapter. eeeeee