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Reviewed by Ben Lee, http://dslrlensesonline.com editor.
The Canon 17-40mm is quite simply a brilliant lens for a reasonable price. It is the lens that spends the most time attached to my DSLR and I love it!
It is also atypically light for an L series lens, which further strengthens its credentials.
But what else does it have to offer? Besides affordability, the 17-40 L offers extremely sharp images throughout its range and auto focus is fast, silent and efficient.
In my personal opinion, there is really not a lot to fault about this lens except for the usual wide open corner softness that you get with wide-angle lenses. I often find that stopping down to f/5.6 (if possible) improves corner sharpness.
Canon 17-40 review
While I may have a slightly biased opinion towards this lens, a lot of people will say that it is too slow.
However, I think we have to take a step back here and really ask ourselves this simple question – what will be the intended purpose of this lens?
In my opinion the 17-40 USM is the perfect landscape lens, especially on a 1.6 FOVCF body because the crop factor makes it look as if you are using a 27.2-64mm lens. Obviously it can also handle architecture, group portraits and a whole lot of other stuff.
As a result of being a more general outdoor piece of kit, the relatively slow (but still decent) f/4.0 maximum aperture will not be a problem in 9 out of 10 situations. Sure, there will be times whilst out in the field that you may need to increase ISO or use a tripod to compensate, but I still think a few people get a bee in their bonnet because this lens may struggle indoors where the light is less predictable.
In the same way that a Ferrari isn’t designed to go off-road, the f/4.0 17-40 wasn’t really meant to be able to perform effortlessly in low light (remember, it doesn’t have image stabilization (IS) either).
Having said that, anyone with a steady hand and slight tweak in setting should still be able to get good shots no matter the environment.
The crux of my point is this – buy a 50mm 1.4 or 16-35 f/2.8 IS if you want the best of both worlds. More so the 16-35 if you like landscapes or the 50mm 1.4 if you prefer portraits.
| What you’ll like |
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| What you might not like |
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What others are saying about the Canon 17-40mm f 4l
“NutMac” from Mountain View, CA, offered some sound advice for anyone thinking about purchasing this lens:
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.
He then goes on to showcase some of the lenses strengths, written in way that clearly shows his passion for the 17-40:
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.
…Thanks to 7 diaphragm blades, this lens can produce very nice bokeh at 40mm (blur effects).
Read the rest of this great review here!
| Where can you buy and how much should you pay? |
When I first got this lens years ago I payed around $1000. Now I have seen it for about 25% less than that on Amazon. Right now they are very reasonably priced and super competitive – the best online in most cases. Check out the low price here.
Please help support the maintenance of this site by using the links mentioned above to make any purchases you might be thinking of making. I get a small commission from your purchase but it doesn’t cost you anymore to buy the lens. Any purchase is greatly appreciated, thankyou.
Conclusion
The Canon 17-40mm is, in essence, the perfect entry level L series lens. Please don’t assume that I mean its optics and performance are to a lesser standard than some other L lenses – what I mean to convey is that the low price will enable many users to upgrade their kit lenses and enter the world of serious quality for the first time.
Not only does the 17-40 lower that barrier somewhat, it also importantly lives up to its reputation of quality and is by no means just a cheap, poor cousin to its L series counterparts.
Anyone who is willing to overlook the apparently slow maximum aperture (and I dare say those sort of people will be in the minority) will undoubtedly find themselves a life long friend with this lens.















