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. Canon EF-s 17-55 2.8 IS USMThe Big Kahuna Walk-Around Zoom Peter Kun Frary. .
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Flare
Flare is not apparent in most photographic situations. However, this lens doesn't do well in extreme flare situations such as a blazing tropical sunset. If I'm heading to the shoreline at sunset, I've learned to grab another lens. As a point of comparison, typical Hawaiian sunsets result in more ghosting and flare than my EF-S 15-85 3.5-5.6 IS USM, but less than my EF 28-135 3.5-5.6 IS USM. Flare can't be corrected later in software. You must prevent flare by using a lens hood, removing cheap filters, or avoiding the flare causing light source in the frame.
Coma
One of my photographic dreams was to shoot nightscapes: distant city lights, stars, and moonlit landscapes. Unfortunately, the wide side of the EF-S 17-55mm 2.8 IS USM renders off-axis points of light—streetlights and stars—with a comet- or wing-like flare—an aberration known as coma. Unfortunately, coma can't be corrected with a lens profile in Lightroom or DPP4. You have to prevent coma by stopping down or zooming to less coma-prone focal lengths during the shoot.
Honolulu | EOS 50D, EF-S 17-55 2.8 IS USM at 17mm, F2.8, 1/13 and ISO 1600. Coma is visible in the far left middle of the frame (see Coma Detail image).

Coma Detail | Crop from the far left middle of the frame shows “wing” coma.

Wide open at f/2.8 and 17mm, the center of the frame is clean, but coma is pronounced in points of light on the periphery. This wing-like flare also exhibits chromatic aberration, i.e., purple fringing. Coma and purple fringing are progressively reduced as the lens is stopped down: significantly reduced by 4 and nearly nil by f/5.6. Having to shoot nightscapes at F5.6 spoils the fun of having a F2.8 lens.
Fremont Casino | EOS 7D and EF-S 17-55 2.8 IS USM at 17mm, F8, 1/15 and ISO 160. No coma at 17mm when stopped down to F8.

Shooting wide open at F2.8, coma is reduced progressively as you zoom and is basically nil by 35mm. This lens is not my first choice for astronomy or city nightscapes, but will do a decent job if you stop down and/or zoom out. Most of my other zooms also exhibit coma wide open, so the EF-S 17-55 2.8 IS USM is average in this regard.
Distortion
I've never noticed distortion because lens profile corrections are automatically applied to RAW files in Lightroom and DPP4. For JPEGs, the profile is applied in-camera. If the lens profile is disabled, mild distortion may be observed. The wide end of this zoom has a little barrel distortion. The long end has slight pincushion distortion. With that said, distortion is less pronounced than the EF 24-105 4L IS USM and EF-S 15-85 3.5-5.6 IS USM.
Light Fall-Off
You won't notice light falloff because DPP4 and Lightroom automatically apply the lens profile to RAW files to remove vignette. In-camera JPEGs are automatically corrected as well. However, like most zooms, the EF-S 17-55 2.8 IS USM has a stop or more of light fall-off when shot wide open. I often prefer images with darker corners and edges and sometimes disable profile corrections for a natural vignette.
Chiesa degli Scalzi | Venice, Italy | EOS 40D and EF-S 17-55 2.8 IS USM

Shutter Shock
When used on DSLRs such as the 20D, 40D and 90D, I had no shutter shock issues. However, when used on the R7 in mechanical shutter mode, images were blurred due to shutter shock. Oddly, there is no shutter shock on the R7 when used with the kit lens, the RF-s 18-150 3.5-6.3 IS STM (or other RF lenses). I suspect that the EF-S 17-55 2.8 IS USM somehow amplifies vibrations from the mechanical shutter of the R7. There is a simple and highly effective workaround: use electronic shutter on the R7. No shutter, no shock. If you must use the mechanical shutter of the R7 for flash sync, first curtain sync suffers less shutter shock.
Popup Flash Blocked?
I was surprised to find the popup flash of my 70D, 80D, and 90D perfectly usable with this lens. I assumed such a bulky lens would completely block the popup, but such is not the case. At 17mm from 2 meters out, there is no shadow from the lens. At closer distances, there is a small shadow at the bottom of the frame. For daylight fill, a flash shadow is unnoticeable.
Incidentally, the EF-S 17-55 2.8 IS USM transmits distance information to the E-TTL II flash algorithm to help improve flash exposure accuracy.
Dust Vac?
The vents behind the front element retaining ring suck in dust during zoom and focus operations. However, dust problems mainly come from lenses lacking UV filters. The filter prevents most dust from being draw in. I've always used a UV or clear filter for protection and my EF-S 17-55 2.8 IS USM is clean after many years of use in deserts, streets, beaches and smoky bars.
Red Goose Shoes | Las Vegas | EOS 50D and EF-S 17-55 2.8 IS USM

If you went without a filter and find a barrel full of lint inside, you may find these dust images and fix enlightening.
Who Is This Lens For?
DSLR
If you own a Canon APS-C format (1.6X crop) DSLR camera such as a 40D, 70D, 80D, or 90D, this lens is ideal for general photography, covering wide, normal, and short telephoto ranges. Although a bit front-on Rebels, it balances well on the XXD series of DSLRs. Mount this lens on your camera, and you're ready for sharp scenics, group shots, candids, and portraits. With the F2.8 aperture, you can venture into low-light situations without a flash and keep ISO and shutter speeds at a reasonable setting.
R Series
If you're willing to use a mount adapter, it’s also a good choice for APS-C R series cameras such as the R7 and R10. However, there are caveats: this lens is heavy and bulky, the adapter increases bulk and weight, and electronic shutter is strongly recommended due to shutter shock with the mechanical shutter. If you can live without IS, consider the slightly sharper and much smaller Sigma 18-50 2.8 DN DC in RF mount. The new price of the Sigma is about the same as a used EF-S 17-55 2.8 IS USM in excellent condition.
No lens is perfect, but once I learned the workarounds and avoided the pitfalls, I was able to bring home thousands of sharp and vivid images.
Makeup Girl BTS | Canon EOS 50D and EF-s 17-55 2.8 IS USM at 28mm, F3.5, 1/60 and ISO 400.

Who is this lens not for? Dedicated video shooters: the ring-USM isn't as smooth as STM and nano USM. Also, astronomy buffs and city nightscape shooters should look elsewhere. For night photography with points of light, a high-quality prime lens, e.g., Samyang 14mm 2.8, will be much better corrected for coma.
Last Blurb
This is the big kahuna royale of normal APS-C EF-s zooms: beefy, well made, generally sharp and fast focusing. However, the demanding 32.5MP sensor of the EOS 90D and R7 revealed warts I hadn't noticed on older cameras: coma and soft corners wide open at F2.8 at 17mm. Nevertheless, this lens is still impressively sharp throughout most of its range even on modern high density sensors.
The combination of 3-stop IS and fast aperture make it ideal for available light shooting on city streets and in dim building interiors. I feel confident to shoot wide open in most situations and bring back sharp images. I bought this lens new in 2006 and loved it for travel, humping it from Vegas to Venice without a whimper or glitch.
Finally, please help support this website by purchasing this lens at Amazon.
More Images taken with the EF-S 17-55 2.8 IS USM (click to enlarge).
- Focal Length: 17-55 mm
- Maximum Aperture: F2.8
- Minimum Aperture: F22
- Lens Construction: 12 groups, 19 elements
- Angle of View: 78° 30' - 27° 50' (diagonal) | 48° - 15° 40' (vertical) | 68° 40' - 23° 20' (horizontal)
- Min. Focusing Distance: 0.35 m/1.2 ft.
- Max. Magnification: 0.17x (at 55 mm)
- Filter Diameter: 77mm
Accessories
- Lens Cap E-77U/E-77 II
- Hood EW-83J
- Case LP1219
- Diameter and Length: 83.5 x 110.6 mm (3.3 x 4.4")
- Weight: 645 g (22.7 oz)
- $879 (new)
- $300-600 used depending on condition
01/11/2007 | Revised 10/12/2026
Source Materials
Canon EFS Lens EF-S17-55mm F/2.8 IS USM Instruction. Tokyo: Canon, 2006. (CT1-7561-001).
©Copyright 2007-27 by Peter Kun Frary | All Rights Reserved