Canon EF 17-40mm f/4L USM Ultra Wide Angle Zoom Lens for Canon SLR Cameras

My walkaround lens The walkaround lens. This very topic leads to a heated discussion among DSLR photographers. irst, determine your budget, focal length, and aperture needs. f you frequently find yourself zooming out to get everything in a frame, you will want a wide ...

Publisher : Canon
Company : Canon
List Price: ~~$0.00~~
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Used Price : $695.00

Features

17-40mm ultra-wide-angle zoom lens with f/4 maximum aperture for Canon SLR cameras
3 aspherical lens elements and super UD glass element create superior optics in all conditions
Powerful ring-type ultra-sonic monitor (USM) produces fast and silent autofocusing
Focuses as close as 11 inches; supports screw-in 77mm filters or up to 3 gel filters
Weather-resistant construction; measures 3.3 inches in diameter; 1-year warranty

Product Description

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

This exciting zoom lens provides ultra wide-angle coverage to the EOS 20D, 30D, 40D, 50D and Digital Rebel SLRs. Equivalent to a 16-35mm zoom, it offers excellent performance and optics designed from the ground-up for digital SLR use. Three Aspherical lens elements, plus a Super-UD element, assure image quality. Its ring-type USM means fast and silent AF along with full-time manual focus. It focuses as close as 9.5 inches.

Excellent optical quality and true wide-angle coverage with select digital SLRs
Superior AF performance and speed, with full-time manual focus by simply turning ring
Close-focusing to 9.5 inches -- fill the frame with subjects as small as 3.6 x 5.4 inches
Relatively compact size and light weight for an ultra-wide zoom lens
Inner focusing system (no front element rotation); length doesn't change if zoomed
Circular aperture design -- natural highlights, even stopped down two stops
Electronic diaphragm -- manually-set apertures stay constant from f/4.5 thru f/22
EF-S lens mount -- exclusively for EOS 20D, 30D, 40D, 50D and Digital Rebel bodies

Amazon.com Product Description

Broaden your perspective with the Canon EF 17-40mm ultra-wide-angle zoom lens. Ideal for both film and digital SLR cameras, the lens offers three aspherical lens elements in addition to a Super UD (ultra-low dispersion) glass element, creating superior optics in all conditions. In addition, the lens focuses as close as 11 inches (0.28mm), and offers both Canon's full-time manual focus and a powerful ring-type ultra-sonic monitor (USM) that produces fast and silent autofocus. Other features include a constant f/4 maximum aperture, the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters, and optical coatings optimized for use with digital cameras. Boasting weather-resistant construction similar to other high-end L-series cameras, the lens carries a one-year warranty.

Focal length: 17-40mm
Maximum aperture: 1:4
Lens construction: 12 elements in 9 groups
Diagonal angle of view: 104 to 57 degrees (at 30 feet)
Focus adjustment: Inner focusing system with USM
Closest focusing distance: 0.9 feet
Zoom system: Rotating type
Filter size: 77mm
Dimensions: 3.3 inches in diameter, 3.8 inches long
Weight: 1.1 pounds

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Customer reviews

My walkaround lens by .. NutMac (Mountain View, CA)
The walkaround lens. This very topic leads to a heated discussion among DSLR photographers.

First, determine your budget, focal length, and aperture needs.

If you frequently find yourself zooming out to get everything in a frame, you will want a wide angle lens such as this. If you frequently find yourself zooming in, this is not the lens for you. On a full frame body such as Canon EOS 5D, this lens becomes ULTRA wide angle. On an APS-C crop body such as Digital Rebel XTi (which I used for this review), it becomes MEDIUM wide angle. But thanks to 1.6x crop factor, this lens expands to more usable 35mm equivalent focal length of 27 to 64mm.

Second, audition the lens if you can.

By definition, a walkaround lens should be relatively portable. At 1.1 lbs., Canon's EF 17-40mm f/4L USM is neither super light nor neck breakingly heavy. In fact, it weighs almost the same as Digital Rebel XTi -- really nice balance. The lens feels very solid with supreme build quality that only L-series lenses offer. Although this lens is weather proof and therefore sealed against liquid and dust, I strongly recommend getting a 77mm filter to protect the front lens element. With it, this lens is made to last.

In terms of looks and feel, it doesn't get much better. Its rubberized full-time inner focus manual ring USM focuses smoothly, quietly, and quickly. Since it's inner focus, the lens will not extend beyond its metal casing whether you zoom in or out. The focus window shows focusing distance from 0.28 meter (0.92 feet) to infinity. The focal length marker indicates 17, 20, 24, 28, 35, and 40mm. The lens exudes quality from tip to tip.

You may tolerate heavier lens or may not mind lesser build quality of cheaper lenses. A walkaround lens will be used very often, so make sure you will be comfortable with it.

This lens is famous for saturated color and deep contrast. Its images are simply stunning. At 17mm wide angle, barrel distortion is noticeable but relatively mild. From 24mm to 40mm, its images are distortion free and perfectly suited at capturing people.

Vignetting (corner darkness) is minimal with mild chroma abberrations (color shadows). At f/4 aperture, details become noticeably softer toward the edges. The center region is very sharp and at f/5.6, edges remain fairy sharp. Thanks to 7 diaphragm blades, this lens can produce very nice bokeh at 40mm (blur effects).

One of the most cited weaknesses is the f/4 aperture. In my experience, a bump in the ISO speed and steady hands are all you need to take well focused images indoor. On the other hand, if you are shooting with very little amount of light, you might wish for f/2.8 or image stabilizer. Although the difference between f/4 and f/2.8 is just 1 stop, my other lens, Canon EF 24-70mm f/2.8L USM (too heavy to be my walkaround lens) easily outperforms in such challenging situations. But by and large, I was not handicapped by the f/4 aperture.

Some of the main competitions (sorted by price):
- Sigma AF 17-70mm f/2.8-4.5 DC macro: Good zoom range with macro, and generally solid performance if you can get a good sample. It does suffer from a bit slow focus mechanism, soft corner, and chroma aberrations. Works only with EF-S mount.
- Sigma 18-50mm f/2.8 EX DC: Very good value for f/2.8 aperture, but Tamron's 17-50mm is a bit better lens overall. Works only with EF-S mount.
- Canon EF-S 17-85mm f/4-5.6 IS USM: This "traveler's lens" has a wider focal range than most wide angle lenses (widest among Canon) and is equipped with an image stabilizer. While it is a Jack of many trades, it is the master of none. Every lenses on this list will perform better at particular focal length. Then again, none of the lenses on this list has as wide focal range. It is famous for extreme barrel distortion at 17mm and chroma aberrations. Works only with EF-S mount.
- Tamron SP AF 17-50mm f/2.8 Di II LD Aspherical (IF): This is the most direct competitor. It takes sharper images with faster aperture while costing less. Both the build and focus mechanism are significantly worse, but should be good enough for many. Works only with EF-S mount.
- Canon EF-S 17-55mm f/2.8 IS USM: This is THE reference, if you can afford it. Its images have razor sharp details and great performance all around (minus vignetting, which is typical of EF-S lenses). The build quality is worse than L-series but still pretty good. Works only with EF-S mount. This is the best EF-S lens hands down.
- Canon EF 16-35mm f/2.8L USM: One of the most expensive wide angle zoom lenses. It's larger and heavier, but has f/2.8 aperture.

This is how Canon EF 17-40mm f/4 USM stacks up.

Pros:
- Among the very best build quality.
- Excellent, buttery smooth, super fast front-focus system.
- Top notch color and contrast. Very sharp center resolution.
- Almost non-existent vignetting, generally low distortion, and well controlled chroma abberrations.
- Ideal weight and size for walkaround purpose

Cons:
- Edge softness at f/4 aperture.
- Narrower focal length than most competing lenses.
- Slower than some third party lenses.

All in all, this is an excellent wide angle walkaround lens. It may not offer the most bang for the buck, but if you value full frame compatibility (EF lens mount) and excellent build quality, this is the default choice. This lens comes with a nice pouch and a lens hood. I find the hood to be somewhat ridiculously shaped and because the lens is resistant to flare, I do not use it often when shooting outdoor.

Great walk-around lens! by .. JanSobieski (United States of America)
Figuring out which lens to buy turned out to be more difficult than which camera to purchase! At least for me. I want my lenses to be a reasonable size (rules out the superb 70-200 f2.8 IS L), acceptably fast (at least f 4.0), preferably black (so that they are inconspicuous), not outrageously priced (admittedly this last factor being entirely subjective), and preferably a zoom for the additional flexibility.

Primes are absolutely fantastic values, reasonably priced, fast, and inconspicuous, BUT offer limited flexibility which, in my mind overrides the other factors.

I purchased this lens for the wider end of my shooting needs and I couldn't be more pleased. It takes beautiful pictures, sharp, beautifully saturated, with no discernable vignetting and little flare under normal circumstances.

This lens has beautiful bokeh IMO and is every bit the equal, again IMO, of the 16-35 f2.8 L in every respect other than speed (f 2.8 vs f 4.0). With the new digital SLR cameras you can easily make up for the loss of speed by cranking up the ISO.

The construction quality is fantastic and it is a lens that you will be able to use forever. It is an ideal lens for the current crop of 1.6 size sensors, but will also serve you well into the future whether you stick with the current size sensor or move up to larger sensors as they become more afordable.

I heartily recommend this lens.

Film Users Alert - It's Not Just For Digital SLRs by .. Dom Miliano (Denville, NJ USA)
For years, I have been using my 28-70 f:2.8 Canon zoom as my "normal" lens. It is sharp (Oh baby is it!) and at 2.8,fast enough for just about any pro or serious amateur. But there were plenty of times I needed a little more coverage than the 28MM focal length provided. Since most of my work is with long-lens and fast (and expensive) zooms, I couldn't pony up the bucks for Canon's superwide f2.8 zoom. When I saw the price on the 17-40MM lens and the fact that it was the "L" flavor with pro glass, I bought it immediately. I've had it for about a year and I have already sold several pictures - published in glossy magazines with picky photo editors. And I trust it to give me sharp pictures, even at the extreme settings - wide open and at the 17MM end. You have to remember to always use the weird looking but effective lens hood to control flare and as with any very wide lens, look at the edges of the frame (your feet could be in every picture!) It's light, good enough to use as your normal lens and with their new 70-300 IS DO lens could make for an amazing and compact travel kit. So while Canon's lens experts probably built this one for the growing digital crowd, as a film user I think it's the bargain of the year and is in my camera bag every time I go on assignment. I suggest that you get a good quality "thin" UV filter and polarizer and you will be set to explore the exciting world of ultra-wide photography.

Important update: I recently returned from an assignment to Monte Carlo to test drive sports cars. Part of the deal was to get thrill rides from a pro driver up and down the French mountains above Monaco. Armed with my 17-40MM an EOS 1V, 540 flash, and Velvia 50, I clicked off a whole roll of film during my turn in the passenger's seat. The magazine editor called me when he saw the slides and said that the shots in the car were the "strongest images" in the shoot. Yup, the lens is that good.

Versatility on the Cheap by .. Eugene F. Fama (Pacific Palisades, CA United States)
No one lens accomplishes every photographic objective. Canon makes each lens at every price point well-suited to various tasks, but with limitations that can only be overcome by graduating to the next higher priced but similar item. A case in point: the wide-angle zooms.

The 17-40mm f/4 is one of Canon's best deals in L-series glass. You have to spend twice as much to get a lens of similar quality, but just one stop faster. Does this make the more-expensive EF 16-35 f/2.8L a ripoff? Not for its own specific use: the extra stop gives you the speed to shoot in more indoor situations. Not all photographers need this. When indoors, we're often taking pictures of people, which are better suited to lengths around 50-100mm. To capture sweeping panoramas of parlors for Architectural Digest (or Coldwell Banker) the f/2.8 is the better lens and worth the step up in price, though in many cases you could use the f/4 lens with a tripod. All this means is that the f/2.8 is priced for professional specialists whereas the f/4 is for more general use. My bigger point is that Canon has its whole lineup positioned: the differences across lenses are specific and appropriately priced, which is good news for the consumer. It's hard to make a mistake buying homegrown Canon lenses, especially L-series lenses. You just have to figure out which set of two or three suits your range of uses.

The 17-40mm is a steal for people who need a walkaround lens for travel and outdoor photography. The shorter focal lengths of the zoom are great on a digital body, with nice reach and minimal distortion; just an ability to grab up landscape and wide situations end-to-end, even when standing close. The focal lengths around 40mm are tight enough for portraits and other local detail. Colors are strong and convincing; contrast deep and impactful. The lens itself is small enough and light enough to grab-and-go, but nicely machined, with solid fit and finish. It has an instantly recognizable profile, with the added bonus of the red ring.

This lens, plus a 70-200mm f/2.8 telescope and a nice fast fixed lens in the range betwixt are all you need. On vacation, and in most outdoor situations, the 17-40mm alone suffices. It makes a good first L-lens, and a staple in the arsenal.

10-22 vs 17-40 by .. Hans Kim (San Francisco, CA USA)
I traded in my EF-S 10-22 for this one, realizing how often I switched back and forth between 10-22 and 24-70. I took some stats in fact, and it turns out I stay mostly between 17-35 range, and never really go any wider than 15-16 even with the 10-22. The wider range of 10-22 certainly gives you a lot of freedom, but I found it to be a bit too artificial due to the unavoidable barrel distortion.

Now, 10-22 is certainly a solidly built piece of glass, but 17-40 does deserve its L label and the red ring. It feels a little heavier than the 10-22, and the focus ring turns with sufficient weight (10-22 feels a little on the lighter side) you can actually fine-tune the focus with greater accuracy. Being an L-series lens, it comes conveniently with a lens pouch and hood.

Under darker conditions, the focus seems a little slower than my other faster lens, but even at f4, it takes crisp shots. I highly recommend this for anyone with a Canon dSLR. If you're planning on moving on to the 1:1 crop bodies (1d or 5d, a less expensive sibling coming out in October) 17-40 can be a good piece of glass to have, as you're going to have to let to of the 10-22 anyways.

I did have a chance to try the 16-35L, but at the smaller aperture range, the difference seems nominal, especially considering the price difference.

I use Canon EOS 20d and Elan 7, and they both pair up nicely with 17-40 4L.