Canon - EF 17-40mm f/4L USM Ultra-Wide Zoom Lens - Black

Canon EF 17–40mm f/4L USM Ultra-Wide Zoom LensThis ultra-wide angle zoom lens is ideal for capturing mountain vistas, group portraits cityscapes and interiors. Weighing just over a pound, it travels easily, whether you plan to take it on a hike or a trans-Atlantic trip. Experience exceptional color and clarity when you pair this lens with your Canon EOS DSLR camera.

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Canon - EF 17-40mm f/4L USM Ultra-Wide Zoom Lens - Black - Angle
Canon - EF 17-40mm f/4L USM Ultra-Wide Zoom Lens - Black
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Ratings & Reviews

Overall Customer Rating:
98% of customers would recommend this product to a friend (101 out of 104)


Compatible with select Canon cameras

For Canon EOS DSLR cameras with APS-C sized sensors and an EF mount.

f/4 maximum aperture

Functions well in shade and in daylight but does not perform as well on overcast days or indoors.

17–40mm focal length

This short-range zoom lens is very useful for everyday photography.

UD (Ultra-low Dispersion) lens element for superior image quality

Effectively corrects chromatic aberration for optimum lens performance.

Ultrasonic Autofocus Motor

Provides fluid, quiet and swift focusing.

0.9' minimum focusing distance

Accommodates 77mm filters

Accessories included

Comes with lens cap, lens dust cap, lens hood and lens case.

Overall customer rating

would recommend to a friend

Expert Rating




  • I bought this lens to add a wide angle to my kit but found that it didn't provide much more range than kit 24-105 so I returned and am planning to get a fisheye lens.BikenMike
    See all reviews that mention range as a con
  • Rating: 5 out of 5 stars

    Great Wide-Angle Solution


    The 17-40mm f/4L is a great wide angle solution for full-frame sensor cameras. If you have a cropped sensor in your camera (XTi, XSi, T1i, 40D, 50D, 7D) then you might rather pick up the excellent EF-S 10-22mm (sku 7170116) which will appear much wider for the same money. Great for landscapes, portraits, fine art, etc. Wide angle lenses can be some of the most fun. I would recommend that keeping heads away from the corners in your portraits (especially at 17mm) or you'll see some pretty strange distortion. You can use Photoshop to correct the lines in wide images if need be. The minimum focusing distance on this lens is great for doing interesting foreground (i.e. a flower) with mountains or hills in the background, however; at f/4 it does blur the background somewhat, so for better focused backgrounds you'll want to work with smaller aperatures (f/11-f22). The build quality is what you would expect from an L ("Luxury") Canon lens, supurb. Autofocus is quick, and images are extremely sharp.

    I would recommend this to a friend

  • Rating: 5 out of 5 stars

    UW walkaround lens

    • Verified PurchaserVerified Purchase
    • My Best Buy® Elite MemberElite Member

    This lens changed my life. I am being literal here, this lens literally changed the way I shoot and the shots I have captured have blown me away. A wide angle lens is, I'm told, meant to be used up close and personal with your subject. I hear a voice in the back of my head going, "Don't use it to get it all in the shot" but you know what, that's garbage. This lens has taken ginormous trees and fit them in my frame with outstanding results. I have captured scenes that would not fit in a standard lens and just cropped them slightly to remove the distortion effects. Up close and personal this lens gets you a different, more realistic, view of your subject. In city streets and markets you get a sense of being surrounded by activity and this lens captures a great majority of it. I have left this on my camera for the whole day and never thought twice about switching to a standard lens. One word of caution - warn your subject that you will be getting up "REAL" close to get the shot otherwise you might look a little cuckoo.

    I would recommend this to a friend

  • Rating: 5 out of 5 stars


    • My Best Buy Premier Silver MemberElite Plus Member

    This is a handsdown highly recommended lens if you guys are looking for upgrade. I am using Canon 60D cropped lens, I was deciding in either getting the 15-85mm standard lens or the Canon L 14-70mm "L" Lens. I read tons of reviews and comparison between the two lens and overwhelmingly this was highly recommended specially if you have the crop sensor just like mine. The 15-85mm lens will not give you sharpness. Using a crop sensor you are still getting 27-64mm 35mm shot which is just perfect. Pictures are so sharp and you get excellent wide view for landscape and outdoor pictures. This lens is also weather sealed so no worries for you. I made a great decision in chosing this lens and remember "L" for LUXURY and that is what you get in choosing this lens.

    I would recommend this to a friend

  • Rating: 5 out of 5 stars

    Most affordable 'L' lens

    • Top 1000 ContributorTop 1000 Contributor

    I bought this lens specifically for my Canon 5DII and it works exceptionally well. The images are tack sharp, the colors are natural and focusing is fast and accurate. The focus ring is easy to manipulate in manual mode and everything works smoothly including turning the zoom ring. This lens compliments my other 'L' lens, the 24-105L. I wished the 17-40mm had IS but the cost would have been prohibitive. Since this is a 17-40mm on FF cameras it's equivalent to a 27-64mm on an APS-C camera. BestBuy had this lens for $20 less a week after I bought it and credited the difference due to their price match guarantee, way to go BestBuy!

    I would recommend this to a friend

  • Rating: 5 out of 5 stars

    A Truly Great Lens For The Money

    • Verified PurchaserVerified Purchase
    • My Best Buy® Elite Plus MemberElite Plus Member

    The Canon 17mm-40mm Zoom lens is incredible. For the money, this lens meets all of my needs for covering corporate receptions, dinners, lunches and conferences. What I like about it over the 24mm-70mm and the 24mm-105mm lenses is that is is so much sharper. I try to avoid zooming back to 17mm unless it's a room shot. Staying between 24mm & 40mm and adjusting my distance to the subjects gives me minimum distortion at the edges and clean, crisp & colorful images that meet my client's requirements as well as my own. This was a great purchase.

    I would recommend this to a friend

  • Rating: 5 out of 5 stars

    Don't listen to the nay-sayers

    • My Best Buy® MemberMember

    This lens is of superb quality. I was blown away at how silent the AF is, not to mention the excellent width of angle (even for the cropped-sensor camera I use). It comes with a great lens hood and case and costs around the same amount for a comparable EF-S lens (which I would emphasize does NOT work on higher-end, full-frame cameras). If you're like me and you plan on upgrading to a more expensive, likely full frame camera, I would go ahead and invest the extra money in this reasonably affordable Luxury class lens. I would absolutely recommend it to anyone.

    I would recommend this to a friend

  • Rating: 5 out of 5 stars

    Excellent investment for landscape photography.

    • My Best Buy® MemberMember

    As a photographer and photography teacher, I consider every photography purchase a long-term investment, so I only buy Canon's L series lenses. Shooting landscapes in the Southwest convinced me that I needed the 17-40, and it has given me the results I want when paired with a Canon 5D Mark 2 body. I can get great panoramic shots without much barrel distortion, and the image clarity is top quality.

    I would recommend this to a friend

  • Rating: 5 out of 5 stars

    First "L" Series Lens Pruchase


    This is my first "L" series lens purchases. I bought this lens based on advice from a friend. (He and I both have the 40D.) My sense is that I have not fully tested its capability out. It has been great for event photography and I enjoy using it. While I am not disappointed at all, I still wish that I purchased the 28-200mm L series lens before this one. But that is not materially important to this discussion. I did use it for a 50th Anniversary wedding celebration and took about 1,500 images. It worked great. (I also have the 10-22mm, so the ultra wide angle is covered there.)

    I would recommend this to a friend

What experts are saying

Rating: 3 out of 5 stars with 2 reviews

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The analysis of all aggregated expert reviews shows that the reviewers are positive about reliability, design, size and usability.
  • PCMagRating, 3 out of 5Jim Fisher on July 15, 2013
    Canon EF 17-40mm f/4L USM
    The Canon EF 17-40mm f/4L USM lens is an inexpensive alternative to the 16-35mm f/2.8, but its edges are muddy at its widest angle.Full Review
  • (UK)Robert Olech on September 22, 2007
    Canon EF 17-40 mm f/4.0L USM
    The Canon EF 17-40 mm f/4L USM was introduced in May 2003 as an ultra wide-angle lens designed for digital and analog cameras with a 35 mm frame detector. Its focal length range allows for a range of view angles from 103.6 to 56.8deg, which makesFull Review

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