I recently bought a Canon Digital Rebel XT, and have really been enjoying it, but wheh I got this lens, the camera became a whole new experience!

All the reviews I read were so great, I knew I was going to love it, but actually using it has been an unexpectedly amazing experience. At 10mm, you see everything. I immediately took shots of various rooms in my house, my back yard-in-the-woods pond, trees, buildings... All I can say is buy this lens!

It's fast, quiet, amazingly versatile, and the image quality you'll get from it is superb! It's a shame to have a great Canon digital SLR camera and never have the opportunity to experience this lens.

If you need a REALLY wide angle lens for your aps-c format Canon Slr, this is the one to get. I played with the offerings from Sigma and Tokina, but this was the one which I chose and I am really happy with the choice. Would be nicer if it were a touch faster or at least with a fixed max aperature. With three aspherical lens elements, plus a Super-UD element, this lens should be a "L" series, a sentiment which you will find in the reviews here and elsewhere. Besides that, it is priced like one too! It doesn't matter what color the stripe on the lens is, what matters is how the photos look and in this area, you will not be dissapointed!

Another reviewer opined that this lens deserves the "L" rating, which Canon reserves for its very best and denotes by putting a red line around the barrel near the objective lens. I agree.

I guess Canon felt that the 3.5-4.5 max apertures were too small, making the lens a little slower than they like for their top models. (So why the red line for the 100-400 zoom at 4.5-5.6? Or the 17-40 zoom at 4.0?) Maybe Canon thinks the 10-22 is not red-line material because it's an EF-S, usable only on Rebels and 20Ds. Hey, it's almost a reason to buy a Rebel or a 20D And its 77-mm business end assures LOTS of light gets to your CMOS.

Okay, all that aside, in the real world this is an excellent, excellent lens. It's so wide-angle you can almost look around corners with it. Yes, it "fisheyes" at the lower half of its range of magnification. (So what else is new for wide-angles?) The 10-22 handles low-light conditions well. I shot a street festival at twilight using ambient light only and have surprisingly bright, clear images. Clear? This lens knows nothing else.

It handles macro/close-ups very well.

This is not the lens I normally keep on my camera, but it's the one I ALWAYS slip into a pocket or bag before going out to shoot, because when I need wide-angle (and don't we almost always need wide-angle lens at some point in a shoot?), it delivers. Big time.

I can't say enough good about this the 10-22. Don't hesitate to get this lens.

I have had this lens for several months now and let me start out by saying WOW. I looked at the lens in the store along with the Sigma 12-24 and I was in total awe of what I saw though the view finder with the Canon 10-22. This is an ultra wide angle lens that is incredible. I went home and thought about where I would use this lens and determined that I would use it quite a bit. I went ahead and bought the lens and I continue to be more impressed with it every time I use it. I have used the lens for both close-up (which can give you some very interesting distortion shots)and wide angle shots with great success.

The 10-22mm is equivalent to 16-35mm field of view. With a minimum focal distance of .24m (about 9.5 inches) you can get very close to objects and still get alot of focal width in the photo. There is incredible clarity in the lens. The photos I have taken are very clear with only a slight hint of softening at the corners at 10mm; everything else is sharp after that. There is a little barrel distortion at 10mm but everything else up to 22mm is nice. I have not gotten any light flare in my photos. The Ultrasonic motor is very quiet. The depth of field is outstanding. A slim UV filter helps prevent some slight vignetting at 10mm. With a maximum aperture that ranges from f/3.5 to f/4.5, the Canon EF-S 10-22mm f/3.5-4.5 USM Lens is a medium speed lens. I would recommend using a tripod if you are at all unsure about your ability to hold the camera still for action shots with this lens. The lens it's self is fairly light weight. If you are going to use filters the lens requires 77mm.

The lens can produce some interesting distortion shots if you are taking close-ups and are not perpendicular to the object. For close-up shots with out distortion it is best to be perpendicular to the object.

Inside the lens housing there are three aspherical lens elements and a Super UD element that produce clear vibrant shots. The lens it's self sturdily built and comfortable to handle.

I am very impressed with this lens. I didn't realize just how wide-angle this lens was. At 10mm, I can stand just a few feet in front of a 13-story building, and get the whole thing in the picture, from the entrance to the top of the building.

As with all very-wide lenses, you have to be careful that you don't have people at the edges of the frame or too close to the lens, or they will appear very distorted when taking pictures at 10mm. Also remember that a wide angle lens is not easy to use at first. Many beginners think they can use it to take pictures of landscapes, but what these lenses do is to emphasize closer objects and make distant objects, like mountains, appear very tiny and far away.

PROS
- optical quality is excellent (deserves an "L" lens designation)
- uses the higher quality ring-type USM focusing
- minimum focusing distance is very close
- surprisingly lightweight
- the only option for EOS digital cameras (Rebel, Rebel XT, 20D) to get true wide angle shots due to the smaller APS-C sensor in those cameras.

CONS
- The lens is a little soft at 10mm, but is very sharp at 12mm and up.
- Canon has not formally committed to how long they will continue to make cameras and lenses using the EF-S system.
- The lens currently only works on the lower-end dSLR cameras -- the 1D and 1Ds cameras cannot use this lens.
- It's expensive. Look for the price to drop within the next year.

In 5 years when you upgrade your camera, there is a possibility that it will not support this lens. This depends on what direction Canon goes in making camera sensors:
1) continue to make cameras that use the smaller APS-C sensor, and keep improving its density to support more and more resolution. This will help keep the dSLR cameras smaller and lighter, and will necessitate making EF-S lenses the standard.
2) make the sensors larger and larger to match, or even exceed, the size of a frame of 35mm film. And at the same time increase the density to yield even more resolution.

I now think that #1 is more likely to happen. APS-C sensors have already roughly matched the resolution of film, and will probably dominate the digital SLR market. The new Rebel XT is impressively tiny, and would probably be much bulkier with a "full-size" sensor.

I have a Canon 20D camera and needed to purchase a wide angle lense for my landscape photography. (I photograph in-ground pools and surroundings)I bought the Canon EF-S 10-22mm lense which turned out to be a spectacular purchase! This lense is everything it is advertised to be. It is able to capture the entire shot I need and has no distortion or vinette's in the corners as some lenses may have. If you are looking for a wide angle lense for your Canon, this is the one to buy!

This lens is not cheap, but it's well worth the money. It indeed deserves the famous "L" designation. I use a Canon EOS 20D and it works wonderfully with the camera. It's quiet, fast and fairly light. Best of all, it shoots extremely sharp photos. This lens allows you to gather a lot into a photo and when shot at unsual angles you can get some very interesting images. Oh--and I once accidentally dropped it on a table without any discernable damage. It feels rugged. You'll be surprised at how much you'll want to use it. Make sure you get a UV protector. This lens is a winner.

I've been more or less addicted to wide angle photography for the last 20 years or thereabouts. Unfortunately, ultra wide angle shooters have been left out of reasonably accessible digital slr photography until very recently. Now there are several viable name brand options available, namely the Canon 10-22mm f3.5-4.5 reviewed here, the Nikon 12-24mm f4, and the Zuiko 7-14mm f4. Because of the 3 different crop factors involved, these lenses end up being pretty close in (35mm equivalent) effective range; 16-35 for the Canon, 18-36 for the Nikon, and 14-28 for the Olympus. Many will caution against purchasing these lenses since they cannot cover the full frame 24x36 format, and cannot even be mounted on a regular body. In the Olympus' case, it doesn't matter since the company has staked its fortunes on the smaller 4/3rds sensor format, and has opened it up to other manufacturers such as Fuji and Panasonic. With the Nikon and Canon, you are taking a leap of faith that the companies will continue to produce 1.5 and 1.6 crop factor sensors into the future so that you will be able to take your crop-only lenses to upgraded digital bodies down the line. To my mind, Olympus has already demonstrated the desirable technical characteristics of a smaller sensor format, so there is good reason to believe that smaller than full frame sensors are here to stay. By extending the glass beyond the mount and into the body, and/or covering a smaller circle, Canon and Nikon are providing those same technical benefits to users of their smaller sensor cameras, namely sharp, extra wide angle in a compact package. Besides which, I'm much more concerned with the photos I couldn't take if I stayed away from the product, than I am with its unknown future upgrade path.

While the Olympus lens and 4/3rds system was intriguing, I felt that the 7-14mm wasn't worth more than double the price of the Canon for 2 extra mm at the wide end. It's also double the weight - making it impractical for use as an everyday lens, and negating the advantages of the E-1 body. So, I was pretty much down to the Canon or the Nikon (or the always available Waitsomemore).

At this point, I should say I'm platform agnostic. In the 80's I happily used Minolta equipment. In the 90's I bought some Nikon gear to use their 15mm prime lens. Basically, if it suits my purposes, I don't care what the label is.

Back to the lenses. The Nikon is more expensive and less wide, but it does have the continuous maximum apeture throughout the range. The Canon is wider, a tad lighter, and a tiny amount faster at the wide end. Both appear to be excellent choices, but I could not consider them independently of the cameras they would be mated to. Since I did not already own a digital body, it also came down to a decision between the Canon 20d & Nikon D70s. Here, the Canon wins for me on quality of sensor and a host of other details.

In practice, the lens is a joy to use. It's sharp. The zoom allows it to be as wide as you need it, which is an improvement over my previous favorite Minolta 20mm 2.8, though it does lack the depth of field scales which the Minolta has. The zoom also allows for keeping the lens mounted without switching as often, and that's important for keeping out dust. It's a very solidly built, quality instrument. Focus is fast if you're into that sort of thing, and nearly silent with the ultrasonic motor. The lens does not extend in length for zooming or focusing, though the front elements do move slightly inside the barrel. Mated to the 20d it's a tool that exceeds my previous film cameras in just about every way imaginable. I'm finally free to make the ultrawide photos that I want to make in the digital domain and the initial results have been outstanding.

If you're into ultrawide and want to go digital, the 20d with 10-22 is a fantastic setup. If you've already gone digital and want to try wide angle, (assuming your camera can use ef-s lenses) this is a true bargain - you get a 16mm, 20mm, 24mm, 28mm, and 35mm all rolled into one. It makes me positively giddy. Thank you, Canon!

If you are content with the APS sized sensor in the Rebels and 20D then this is a great lens-- perhaps the best in the EF-S lineup. However, if you plan to upgrade to the 5D which will be released later this month, or another full frame sensor Canon DSLR, then this lens will not work due to the fact that the mirror for the 35mm sized sensors would impact the lens. As such no EF-S lenses will work with the 1Ds, the 5D, or their progeny.

Lens performs almost flawlessly. Nearly no chromatic aberation or other unwanted distortion. For those who miss their wide-angle capability when switching from film to a 1.5 or 1.6 lens factor, a lens like this is a must.

This is one terrific lens! It solves the problem of wide-angle coverage in the 1.6 FOVCF very nicely. As others have pointed out, the mechanical build and optical quality (with 3 Aspherical elements and 1 Super-UD) probably deserve an "L" stamp and a red ring. This lens appears to be of almost identical build, quality and size as the EF 17-40mm f/4.0 L USM. Even uses the same 77mm filter size as most of the L's. Overall sharpness is excellent, with maybe a little softness towards the corners at 10mm, but I've seen comparisons with other ultra-wide zooms like the Sigma and the Canon blows them away! CA is well controlled too. There is slight Barrel and Pincushion distortions present at the low and high ends, but less than would be expected for a lens this wide. All in all this is one of the best wide-angle zooms available.

The major criticism of this lens usually comes down to; "well, how long will Canon continue to make 1.6 FOVCF cameras?" or "Someday I might upgrade to a Full Frame camera, then what will I do with this lens?" I doubt very seriously that Canon will do away with the APS-C cameras any time soon. My reasoning is that:

1. Canon just came out with the Full Frame 5D at the $3000 price point. Introducing a FF camera to replace the 20D at $1500 would kill the 5D after only a few months.
2. Having the EF-S lens line already established almost guarantees keeping the 1.6 format - mostly because of this lens. To be able to use the EF-S 10-22mm, a chip can't really go any bigger than 1.6 since this seems to be the limit of the useable coverage. Using a 1.5 or 1.4 sensor for example would probably start to introduce significant fall-off at the corners of the larger chip.

As I am writing this, the PMA conference is only four days away. My prediction is that Canon will announce a replacement for the 20D that will, in essence be a 1.6 FOVCF version of the 5D. They will probably increase the (already excellent) density of the 20D's CMOS by shrinking pixel size down to around 5 micron yielding something around the 10 mega-pixel range to compete with the Nikon D200. Maybe they will call the camera the 50D after the 5D since they can't really use the name 30D because D30 was already used.

In any case, my point is that the 1.6 APS-C format will likely be around for some time to come, until the point where the FF price point drops enough to warrant discontinuing the xxD line. Even then, when that happens, doesn't mean you'll throw your 20D in the trash! You'll still want to keep using it and/or sell it, and having this lens will significantly increase its usefulness or resale value.

Now, having said all that, this is the only EF-S lens I plan on buying. From the reviews I've read, the other EF-S lenses are of significantly lesser quality, and all of your other lens needs can be met with standard EF lenses anyway, APS-C or otherwise. Plus you get the option to buy L glass.

So, bottom line is buying this particular EF-S lens for a 20D or XT is a no-brainer. It's the best solution for wide angle in this format. Hesitating to buy it because "I might get a FF camera someday" is also nonsensical. What I might do in the future is just that, for the future. Not buying a mid-priced car today because "someday" I might buy a Ferrari doesn't satisfy my use and enjoyment of the car today!

I recently bought this lens, and even though I knew the mathematics, the increase in field-of-view it provides over the 17-85mm IS still surprised me when I first looked through that lens. I'm in the process of selling a house, and this lens is great to take the indoor pictures for the various ads (although it's also easy to make every room look like a deep tunnel -- composition gets a little trickier).

So far the imaging qualities seem to be better than any other lens I own (I don't have canon L-glass). The construction is also quite good -- on par with the 17-85mm IS, I'd say. Size and weight are also similar to the 17-85, which makes it a great match for a 20D camera.

This lens' weakest feature is it's maximum aperture: f/3.5 at the wide end is not horrible, but I always long for faster optics.

Not cheap, but it seems superior to the alternatives in its class. (Note that 10mm offers a significant FOV increase of 12mm, even though the numbers seem close.)

I owned a super wide angle lens for my 35mm Canon's, and I really missed having a good wide angle to go with my Rebel XT. I finally talked myself into spending a lot of money and bought this lens. I can honestly say that I do not regret it. This lens is amazing. The quality is exceptional. It is very sharp, and the lens is very sturdy. I find myself using this as a standard lens very often. Many of my favorite shots are taken at 10mm. The wide angle this lens offers at 10mm really gives you a whole new perspective on how you can take pictures. I would recommend this lens to anyone who wants to venture into the world of super wide angles.

I have been thinking/researching about other cheaper ultra wide angle zoom but finally decided to stick to Canon. I amost wanted to buy the Sigma but decided against it after having two other Sigma lenses (30mm and 18-200mm) These two are great lenses, especially the 30mm but one problem is that they have occasional autofocus problem on my Canon 350D. This is understanble because 3rd party lens will never be 100% compatible and you pay for what you get. I am not a Canon brand loyalty and I will buy other 3rd party lenses in the future so don't get me wrong. At this price, I was not going to risk and therefore I bought the Canon 10-22mm instead of the Sigma 10-20mm as good quality ultrawide angle pic is VERY important to me and I do not want to regret.

And, having bought this lens, I thank myself for not trying to save ?100 to get the Sigma. Everything meets my expectation and more. I have used this lens for general walkaround more than my other lenses since acquiring this lens! The field of view is SO wide that if not careful, you will include your feet in the picture!

USing this lens is a whole new experience as careful compositionis required not to create distortion or including things that you do not want to be framed.

Bad points (yes there are some but not on image quality):
-too bulky/big (thank god it is light in weight)
-needs a 77mm filter to protect the front element, this is another sum of money required!
-feels cheap (due to its plasticky feel)

I have some real life samples here to show you if you are interested, they were taken while I was having my holiday in Malaysia last december (2005):
(not all pics taken with this lens, but each photo is indicated with type of lens used)
http://www.theteh.com/html/malaysia_2005.html

Hope this helps your decision!

I just recently purchased my copy of this lens from Amazon.com and let me tell you it was at an excellent price. I got the lens, and went down to 42nd street (NYC) to try it out, and I have to say wow... it's just amazing. I have to really say it's great. You just can't get enough of the super wide angle of the 10mm end of the spectrum. Anyone that has used the 18-55 for most of there time will cry with relief when they order, and get their hands on this lens. The contrast, clarity, and sharpness is amazing. Even the autofocus is super fast...

Thanks for a great buy.

I picked up this lens when I purchased my 30D. All I can say is WOW! What a terrific lens this is. If not for the "S" designation it would probably be an "L" lens for sure.

OK, so it won't work on the 5D & up...who cares..? Frankly I don't see the point of the 5D. It has nothing over the 30D in real life terms...might as well bite the bullet and head for the 1Ds Mark II. In which case money can no longer be considered part of the equation...it's just a serious tool.

If you own one of the cameras that can use it, or are thinking about such a move, by all means grab this one. Yeah, other makers have a lens that's about the same but let's face it...nothing beats a quality Canon USM lens. And this is just that...a quality USM lens.

Between this and the other lenses I just bought (24-70 f/2.8L & 70-200 f/2.8L), I may just have to put my Nikon F4s up for sale...or hand it over to my kids.

This lens feels sturdy and is amazingly wide especially considering the 1.6X factor of the XT which makes lenses 1.6X narrower than normal. So basically you have a 16-35 lens. This is not really the best range for just everyday shooting so you really have to have a goal in mind when using this lens. Landscapes that include close-ups along with lots of background are the main things that I use this lens for. I have also used it for forest interior, sunrise/sunset, and indoor shooting. All-in-all this is a very nice lens and if you have the need for such a lens this is a good choice.

I highly recommend this super wide angle lens for anyone wanting to take landscape pictures, buildings or lots of other stuff!

It is so different than the standard kit lens (18-55). You won't be sorry when you start learning all the possibilities of the extraordinary lens.

The Canon EF-S 10-22mm f/3.5-4.5 USM SLR Lens for Canon EF-S SLRs (like the 20D and 30D) is a good all round lens though it can be soft at 10mm. It only works with EF-S compatable cameras which presently have 1.6x multipliers so the lens is effectively a 16mm to 35mm. If you need to shoot in cramped spaces, or you shoot lots of interiors and you need a wide angle, and have an EF-S SLR this lens is required equipment.

I had the Tokina 12-24 f4 and it was a great sharp lens. This Canon focuses faster and is wider. If you're worried about full frame in the future don't be. Just buy this lens and enjoy the ultra wide images. It light, fast and sharp. "L" quality pictures. The build could be better but I don't see any problems down the road. Some images I shot an be found here
[...]

Up Front: If you're considering this lens, stop considering - and buy it. I had occasion to try the Tamaron Zoom in this range and noticed plastic-y digital qualities in some of the Tamaron's highlighted-texture areas. None of that is a problem with this Canon beauty. I am using it as my normal lens. The contrast is razor-sharp enough to shave with. It's graphic in monochrome and colors are pure and leap off the monitor like a politician attracted by a TV camera. It's also light weight and plenty fast enough with practically no spherical Abs....

Tiny problems include an understandable perspective bulging on subjects about the edges. And there is some blue fringing on very high contrast edges. Photoshop nails the latter dead'er than Britney Spears' career. I've had a need for reasonably large blow-ups, with most captures cropped, yet still enlarged up to prints that are minimally 13X20. At that size not only does this lens reproduce a subject's pores, but you can peer down and see the stuff inside the craters.

If you have a 1.6x cropped sensor, then this is really the only super wide angle lens canon makes. The crop factor makes this equivalent to a 16-35mm lens on a full sensor. The construction quality feels solid and well built. That said, this is not an "L" lens. I'm not an "L" snob ... I'll take a value where ever I can get it. The sharpness on this lens is pretty good, but not razor sharp. Even on a tripod, even at F/8 or F/11, even with MLU, it's acceptably sharp, but not amazingly sharp. Even so, I love using this lens because the wide angle creates some great composures. The other place this lens falls short is contrast. Once again, acceptable but not amazing. This is a good lens, but not a great one.

Many great things have already been said about this lens, and I will support them!

My copy delivers outstanding sharpness (nearly on par with my 24-70L) even *wide open* (rare for a wide angle of all but the finest German manufacturers), great color, very little distortion (many objective tests have revealed that it's probably the "best of breed" ultra wide angle), and impressive contrast. Surprisingly, the build quality is not bad: tight fitting mount, damped rings, and no jiggles or rattles.

If I were forced to offer a (slight) negative, it would be the bokeh of the lens is somewhat "marbly"...However, when shooting a subject with an OOF area differential high enough to make bokeh a component of the frame, then the subject is likely going to demand far more attention than the bokeh! ;)

A fine lens, Canon: definitely worth the premium over the Sigma and Tokina rivals (both of which I sampled before purchasing this optic).

I had a chance to compare it with a Tokina glass. Canon is better on a contrast and better on a distortion, same or even slightly worse on a sharpness, and complete looser on a build quality.
If you are ok with 12mm - get Tokina.

This is a great lens for any user, professional or amateur. This lens offers incredibly wide focal lengths all while giving very impressive/clean results. A slight distortion is noticeable when shooting at 10mm (16mm cropped) but this is easily correctable with software. In addition, the very fast and absolutely silent USM is a huge plus. I highly recommend this lens to anyone wanting great landscapes or great in door/architecture shots (especially realtors).

Technical details on this lens can be found in abundance elsewhere, so I'll leave that to the experts and simply say: This is my favorite lens. I love this lens SO much. I have half a dozen other medium to high-end lenses, and this is the one I keep on the camera 90% of the time.

My take on this lens is that it is an "L" quality optic in a fine, non "L" package. There is nothing else on the market to compete with it (nothing at all), and it produces supurb images. It isn't an f/2.8 lens, but it is close enough for most uses. The competition from Tamron is a full stop slower, not as sharp, and is awful in dim light compared to the Canon 10-22 lens (sorry, Tamron fans, but the Tamron lens isn't even playing in the same ballpark).

I use this lens on a 30D body, and I always keep it on hand if I'm doing any indoor, or tight group photography. It is the perfect solution to the perennial problem of not having enough room to capture all the kids at a birthday party in one shot because your back is up against a wall. This lens will just about get your toes into the picture at the widest setting, yet delivers tack sharp, colorful, and contrasty images. The auto focus is spot on, silent, and fast. It is a must have lens for the active amateur, or any pro using a 1.6 crop factor camera. You simply can't beat this lens with anything available on the market today.

That beng said, do not try to convince yourself that this will make a good "walkaround" lens. It isn't. Even at max length, it is far too short to live on your camera as a standard lens. You need this lens, even if you don't know it yet, but it should not be your first lens, as it will only be used 15 to 20 percent of the time. At those times, it's performance simply cannot be equaled by any other zoom lens on a 1.6 crop factor camera. You will be amazed by the quality of this lens. It rivals the performance of modern prime lenses, presents a bright viewfinder image, and delivers the goods in tight situations.

This is not a casual assessment, nor a Canon "feel good" moment on my part. I developed my first B&W contact prints in 1964, in my own darkroom at the age of 9 (my parents were concerned:)), and have been an avid photographer ever since. Small, medium, and large format cameras and lenses have passed through my hands over the years, and Canon has become my favorite small format brand. Still, Canon builds some trash lenses that should be avoided. The 10-22 USM is not one of them :).

Before you go out and buy this lens, you should already own the EF-S 17-55mm IS f/2.8 lens. That is the king of 1.6 crop factor standard lenses, and includes the awesome Canon IS feature. It will end up being mounted on your camera 80% of the time, and keep you smiling after every shoot. Get that lens first. Then, get the 10-22mm lens. Then, let your imagination run wild, and plan on serious telephoto lenses for the future. Trust me or not, the two lenses mentioned above will provide you with photographic tools that will astound you. Get them in your kit as soon as you can afford them.

A little warning about either lens.... Some here will argue the point, but with either lens, get a GOOD quality UV filter that is multi-coated on both sides, and built extra thin to avoid vignetting at wide lens settings. A good filter will cost a little less than one hundred Dollars, and can cost up to one hundred forty Dollars. The minimum brand would be Hoya Pro 1 multi coated filters, and the ante goes up from there.

Everything else is garbage, including the Canon "sharp cut" filter that costs less than fifty bucks. No kidding, no conjecture. If you use cheap filters, you will never see what your lens can really do. Ever. No doubt that many will respond with claims that their twenty Dollar filter works just fine, but they simply don't know any better, and have never used their expensive equipment to it's full potential. It's akin to a Chevy owner passing judgement on a Mercedes Benz. The Chevy might feel real good, but until you own the Mercedes, you just have no clue.

Bottom line.... Make sure that the quality of your filters exceed the quality of your lenses. Yes, at a hundred bucks a pop for a 77mm filter, it hurts, but you will never regret it. Also, Amazon does not stock lens hoods for all non L Canon lenses. The price is stupid high for those hoods, but they make a night and day difference in in picture quality. Whenever you order a non L Canon lens, find a web seller who has the hood in stock, and get it right now. Again, you will never regret owning it.

That's it for my review/rant. Buy this lens. Buy the 17-55 IS f/2,8 first. Buy the lens hoods for both. Toss any "kit" lenses that came with the camera in the trash bin (where they belong), and be very happy.

The Canon 10-22mm zoom is made specifcally for Canon single lens reflexes with "APS"-size sensors -- the various iterations of the Digital Rebel and the 10D-20D-30D series. It won't work on an SLR with a "full-size" sensor like the Canon 5D.

Most SLRs come with a standard 17-55 or 17-85mm zoom that has a maximum field of view equal to a 28mm wide angle lens on a full-frame SLR. On the cameras it fits, the 10-22mm lens give you the same field of view as a 16 - 35mm zoom on a normal 35mm SLR. It's the wide end of things that brings a whole new world to photography. With this lens you can capture the whole horizon in a landscape, get the whole room in an interior shot, and capture the full view of a street scene. And if you get down low or up high, you can get some very dramatic views. Just be careful the keep the camera level. You can correct for those inevitable converging lines using Photoshop.

There are less expensive alternatives to this lens, notably the Sigma 10-20mm, but the Canon's corner-to-corner resolution and almost negligible distortion and chromatic aberration make the Canon worth something extra. (You may be able to pick up a Canon-refurbished lens from one of the large retailers from time to time, and that cuts the difference between the Sigma and the Canon in half, although you get a shorter warranty).

Canon ought to include a lens shade, and you should consider buying one. Although you don't need it to reduce flare, the hood does provide some protection for the front element of the lens if you don't use a filter.

Assuming Canon continues to make SLRs with APS-size sensors, the lens will be around for a long time, and even if Canon switches to full frame sensors, you can use it as long as you have your existing Digital Rebel or 10-20-30D.

I spent a great deal time studying the different manufactures lens' and talked to a number of "better" photographers than myself. The bottom line was I sprung for the few extra dollors and got the Canon. I have been extremely pleased with this lens a if I had to do it over again, I would just get the Canon. I'm sure the other lense are great but I'm happy I got this one and I use it as a general lens more than I thought I would. The Pictures are superb. Prior to this lens, I got the 70-300 IS DO canon lens when I couldn't get a 70-300 IS last summer before trip to Africa to climb Mt. Kilimanjaro and go on a Safari. For me the extra money was worth it for the the smaller size and truly outstanding pictures. All of this from a prior Nikon user. And to think I was breath away from getting the Nikon 70 instead of the Canon Rebal XT.

I find myself using this lense more and more. It allows you to capture a much wider angle view than any other lens. Allows for very creative pictures, but does come with a learning curve.
It has pretty significant barrel distortion at 10mm but understandibe.

Great quality, amazing pictures,a little overpriced considering the fact you can only use this lens with the low end canon models, so it will be great until you consider upgrading to a 5d or higher.If you are interested in this lens for the long haul try the 17-40mm, you will get similar results when you upgrade and don't have the magnification factor.

Great wide angle lens. There is minimal to no distortion around the edges. This lens does not have a L/tag on it, but the picture quality could be compared to it. Sure it doesn't have all the metal housing that L-glass does, but it can hold its own in the field. The USM speaks for itself, FAST, FAST, FAST. Worth the price. The lens takes my XTI to a new level.

This is my first "true" wide angle lens (DSLR) and I could not be happier. I have only tested it thus far, but my initial judgment is that this is the ultimate! One can get a great "fish eye" effect at the 10mm end and achielve a great wide angle view all the way up to 22mm. I have aspirations of greatness with this lens and will post some photos once the weater clears up.

Overall, a must have for the artistic, interior, or architectural photographer.

Jajajaja, these Canon lens are very, very good. Dyscover the new world

I liked this lens a lot and I used it extensively on my XT for the past year, shooting over 2000 images with it. Comparing it with L lenses like the 16-35mm and 17-40mm, however, could point out a few flaws. This lens,
- Should require post-processing or in-camera processing to churn out sharp images
- Is soft on the edges
- Has less saturated colors
I have upgraded to a 5D and replaced this lens with a 17-40mm. The 10-22mm costs just as much as the 17-40mm but not as sharp. Therefore, I could only give it a 4 star.

After a few weeks of research I finally decide to go ahead and buy the Canon 10-22mm. I was very excited to try it out after reading reviews that said, "It has "L" quality sharpness." This couldn't be farther from the truth. At close to $700 it is built out of cheap plastic. It feels very fragile in your hands. And the most important thing it lacked sharpness.

Now when used as a semi Macro lens it does produce some very good pictures, still not "L" quality but very acceptable. But when used for landscapes in ideal lighting its performance is very unacceptable. I was expecting barrel distortion so it was no surprise to see it and I know there are programs to fix it. I also knew that some people reported vignette but I wasn't expecting it to be as bad as it was. And the picture was very soft even at the centered focal point. These flaws along with the construction do not justify the expense. Some people reported the lens performing well out of the 10mm range. Most people reported the lens working best from 12mm or 14mm through about 17mm. I refuse to pay for a product that doesn't perform in all ranges especially at that price. I see it like going to a car wash paying $20 and only having 70% of your car washed.

I did return the lens to Amazon. I will say the return process was smooth and painless. I would prefer a faster refund (10-14 days) but over all I am satisfied with the service.

I bought this because I needed a wide-angle lens that I thought I'd use only for special situations... I was wrong. I use this lens a LOT more than I thought I would... Just adding to shots that don't otherwise need a wide angle gives you a really interesting perspective. Highly, highly recommended!!

This lens does everything as advertised. I take pictures for real estate sales and was unable to get show the the full inside of rooms. With the wide angle lens I can stand at a doorway and show the whole room.

This is a really, really nice lens. I photograph real estate and the agents are loving the photos.

I have owned this lens for about 16 months and am extremely pleased with it. I have a Digital Rebel (300D), so the EF-S designation is perfect for me (for now). It took a little getting used to, as I had never shot with a ultra wide lens before, but I love the possibilities it offers. For instance, I can stand remarkably close to a large object (i.e. building, monument, landscape feature) and easily fit the entire object in the frame. There is, of course, considerable trapezoidal effect in these shots, but that can be corrected fairly easily in Photoshop.

While shopping for an ultra wide lens, I visited a local camera shop and compared the EF-S 10-22 to a 17-40 L on my Digital Rebel. The sales guy and I went outside, took several shots with each lens, downloaded them to a computer in the store and compared them side-by-side. We took the same shot with the same settings, then the same shot with each lens wide open. The results were extremely surprising.
There was no noticeable difference in color or sharpness quality between the two lenses in the focal areas of the images. Both lenses produced very good images, but the L lens certainly wasn't better. This was a pretty big surprise to both of us. The even bigger surprise was the EF-S was VERY noticeably sharper around the edges at 10mm f3.5 vs the L lens at 17mm f4. The sales guy was completely amazed, as he had started off by giving me the usual speech about the superiority of Canon L series lenses. I think our experiment has given him something different to tell his customers!
I still believe there are great reasons to buy L lenses, and someday soon I probably will. But I walked out of there with the EF-S lens, especially considering both were the same price and the 10-22 is markedly wider on my DRebel (no surprise!).

Pros: ultra wide angle capability for APS-C cameras, "L-like" build quality and sharpness
Cons: EF-S designation limits compatible cameras (resulting in half star reduction)

In summary, this lens is my photographic "pride and joy", and it travels everywhere with me.

I got frustated with soft photos from the kit lens with my Canon 350D (Rebel XT) and was looking for a wide lens with great optics. I have to say this lens has completely blown my mind. It's given me a whole different perspective with the ultra wide angle and I'm just loving every bit of it. And it's tack sharp with haze control and lovely colors.

Clear crisp pictures, excellent zoom that still incorporates the entire scene.

Good for close up shots as well, but you have to get really close to your subject.

A bit pricey, but still an excellent addition to your lens arsenal.

I REALLY like this lens, since it is an EF-S, it can't carry an "L" rating, but it should. Images are razor sharp, the Ultrasonic motor is smooth, fast, and quiet and focusing is very accurate. There is little perceptable barrel distortion, even at 10mm. The lens feels nicely balanced on my 30D.

The only negative thing I can think of is not having the EW83E lens hood included with it. I got one with my 24 - 105 lens.

This lens is extremely versatile and very sharp. I bought one for personal use and liked it so much that I bought one for my office. I have used it to photograph interiors of buildings and even cars. It goes very wide. I looked at competing lenses before buying the Canon, but I'm very happy with my choice.

The downside is that this lens only works on some Canon bodies. I like the lens so much that I plan to keep a camera specifically so I can use this lens for many, many years.

I thought a lot about this lens and sigma 10-20 mm before plunging into Canon and I never regret the decision I took!!
This lens is amazing and provides beautiful wide angle shots with 'WOW' factor in each and every shot... Very less distraction, decently built body...apart from this it is THE Canon Optics that gives this a differentiating factor from other third party manufacturers and it is worth the premium you pay for Canon optics.

As with most canon pro or semi/pro lenses this unit does a nice job all the way around. But, for a wide angle, it's overpriced. A much better buy and the same quality is the Sigma 10-20mm f/4-5.6 EX DC HSM Lens for Canon Digital SLR Cameras. The only thing Canon has as a plus over the Sigma, is about 1 f stop. Since almost all wide angle uses at this mm are outdoors, is it worth over $200 more?

This is a terrific lens--the equivalent to 16-35mm on a full sensor camera. I've had a 20mm in the past and love the wide angle view. The 10-22 even adds 4 mm to the viewing angle so you can take even more unique pix with it. Canon is it as far as I'm concerned. I've owned several of their cameras and loved each one. Now, with the D30, I can fire away at will. In addition to the 10-22, I carry the 17-85 and the 70-300 DO lenses. Makes for a range of 16 to over 400 mm, enough to tackle nearly all shooting situations.

I can hear the comments already. "You must have gotten a bad one" etc. I grant you, one cannot expect perfection (or even consistent quality?) for $675. And I have no doubt that the Sigma ultra wide zoom is even worse. But based on the comments I read I wasn't prepared for the results this lens produces.

I'm not going to boast about how long I've been taking photos or that I'm a bigshot pro (black Nikon syndrome, if you go back that far). But for the benefit of those who are new to this stuff let me summarize. There are no bad macro lenses (not even Sigma). There are virtually no bad telephoto lenses. There aren't even many bad telephoto zooms anymore. Not surprisingly, Canon's L lenses in these categories are excellent and so are most of their non-L lenses and everybody else's lenses too. Low dispersion, apochromatic correction, everybody's got it. Big deal.

But just as there are no bad 80-200mm lenses, there are no really exceptional wide angle zooms. Read the comments on Canon's $1600, 16-35 L lens. Its OK but neither the original or the new "improved" model is spectacular. These lenses always have barrel distortion at the wide end (not a given in wide angle lenses) soft corners and vignetting. Some of this has to do with ultra-wides being used with digital sensors but the fact remains.

OK, so I decided to go digital. Since the 5D doesn't even have a dust removal feature I decided to get a couple Rebels. Picture quality is very similar to the 20D/30D and I'm not going to hammer nails with them so the Rebels are fine. (All these doctors and dentists talking about "build quality", as if they were going to Iraq).

If you want any sort of wide angle with a Rebel or 20D/30D/40D, the 10-22 lens is pretty much it. Canon's 20, 24, 28 are nothing special so why not get the zoom and if need be, use software like DxO to correct any lens flaws. That was the plan but this lens just isn't sharp enough at the edges or in the corners. It reminded me of a Spiratone/Sun 24-40mm zoom I had many years ago. It was revolutionary, super convenient and very poor.

I guess it depends what you are looking for. If you are a real estate agent needing an adjustable wide angle for interiors and your images are for the web this lens would be fabulous. It focuses very fast and its silent. For a Canon lens its pretty small and light. But make a crisp 8x10 print from an image taken at the 10mm setting? I don't see how.

I know everybody raves about this lens. That's why I bought it. I figured, in all those reviews there had to be somebody who knew what really good image quality was. There were so few negative comments, I figured I'd take a chance. Maybe I got a bad one but when something is this far off the mark I think I'll pass.

This lense is so much wide, i used in the habana streets where old buildings sorround you, and i got great pictures.

I received this lens a couple of weeks ago and I am very impressed. I'm using it on a Rebel XT and a 40D and it has filled the ultra wide angle/wide angle gap with my lenses. It adds a whole other dimension to my photography which I could never achieve with my 24-105L IS. And the minimum focusing depth (9.5") is great for those close up effects especially of my baby girl. If your on the fence about this lens don't be. Get it and enjoy!

It's a fine lens given the difficulties with wide angle on 1.6 crop cameras. I purchased this for use with my 20D. I dont think there is a better option in the wide angle area, however I often find myself refraiming trying to squeeze the motive into my 24-70 f.2,8 lens insted because there is an unquestionable difference in picture and color quality between these two lenses. I know this comparision is unfair, but it has resultet in me not using this lens as often as I thought I would...

This lens is great! It allows me to photogragh an entire room in one shot. The sharpness and the colors are amazing! I love this lens!!!

I own the 17-40mm L, but wanted an even wider angle. I didn't know if I'd like this lens or even use it much given I have the 17-40mm. Well, the 10mm wide end versus 17mm is very different, and I am loving this lens! I've gotten some incredible shots. I will keep the 17-40mm because I will move up to a full-frame sensor in the future, but in the mean time this has replaced it; I didn't realize what I was missing since going digital until I got this lens. To my eyes the barrel or pincushion distortion mentioned by others is not apparent, lines stay pretty straight. Tip: get Photoshop CS3 if you can upgrade to it or can afford it, it has a perspective correction filter that works well (also corrects barrel/pincushion effects) -- just don't try and overdo it.

I haven't had this much fun with a lens for many, many years.

This lens is optically as good as my L series lenses. The zoom range allows for some really great shots! I highly recommend this lens!!!

If you are reading this review then you likely already know the pro's and cons of this lens. It's not compatible with the full frame bodies and as such if you have near term plans to upgrade to full frame any time soon then stop reading here and buy one of the L series wide angle lenses.

What this lens is:
This is a great ultra wide angle lens. Image quality is surprisingly solid and held up well against some expensive prime lenses.
It is light enough not to be a burden and the build quality while not on par with the L-Series lenses is solid enough.
This is the only real canon option for ultra wide angles on a 1.6 crop factor body.
From a range coverage point of view this is a good pair for the 24-70 which is my other every-trip lens.
Great indoor lens as well as landscape lens.
Lots of fun when experimenting with ultra-wide angles, especially with the close focus distance.

What this lens is not:
Some reviews say this is a great walk around lens. It is not! It is an ultra-wide angle lens and as such does not do well with portrait shots, unless you have a large group or are looking for a portrait with a large amount of (in focus) background.
Once you get to the 4.5 stop, low light indoor shots become trickier, this isn't a fast lens.

What you should know:
I bought a standard tiffen UV filter and didn't see noticeable vignetting. Initially I tried the wide angle filter but the lens cap won't stay on. If you do buy a wide angle filter ensure it comes with a sleeve style cap.
The lens doesn't ship with a hood or case. I purchased the Lowepro Lens Case 1 which fits this lens well (though not with the hood). The canon hood seems to help and is not too expensive.


This is an expensive lens, but I certainly don't regret the purchase and have captured some landscape and outdoor photos which I couldn't have come close to without such a wide angle. If it was full frame compatible then I would give it 5 stars.

Cost for this lens was not that much more than 3rd party similar wide angle for Canon Digital SLR. This lens has similar specifications to the third party lens I also looked at but Canon quality and image resolution was far better. I can positively recommend this lens to Canon Digital SLR users.

Do not be fooled by this supposed 73% discount. The street price on this lens is what Amazon is charging - there is no special sale here.

Best Wide Angle Lens For the Price! Canon has made a great product and Amazon has the BEST price. I use this lens mostly for Real Estate pictures. It allows me to be in a tight space (like a Condo) and still get the whole room in the picture.[...].

I bought this lens as I do a lot of night photography in abandoned places and my current EF 17-40mm f/4 L USM lens (which is a top-notch workhorse) just didn't have the width I needed in the cramped places. This lens answered that problem. I can stand compose a shot literally a foot in front of a subject and get the entire thing in the frame. There's some distortion on a 1.6x FOVCF body (I use a 30D and 40D), but think if how much more it would be on a full-frame body (which, BTW, there are no full-frame bodies that take EF-S lenses, sadly).

What I like about this lens:
- lightweight
- easy to use
- take a 77mm filter which all my other L glass use
- TACK SHARP! (L glass quality)

What I DISlike about this lens:
- the focus and zoom rings are opposite from all my other lenses (which are L glass). On this lens, the zoom ring is further away from the body and the focus ring is inside (toward the mount). That's opposite from any other L lens I own. Kind of frustrating.
- WAY TOO expensive! I don't care how wide or tack sharp this lens is, it's more expensive than my 17-40mm f/4 L glass and that lens is an absolutel workhorse! This lens belongs down in the $450 - $499 price range.
- EF-S mount.... don't know how long Canon plans to make pro-line bodies that take this mount. It was mostly designed for the Rebel series consumer "Target and Wal-Mart" bodies (which are pieces of plastic junk).

I love my 10-22. It's one of the main reasons I still have my 40D and haven't gone strictly full-frame.

It gets insanely wide, and can make for some humorous pictures when focusing an inch away from someone's nose (and still photographing their ears & the background).

great lens, great quality glass (it's L-quality glass, if i remember correctly ... canon just won't give L-classification to EF-S lenses)

This lens is phenomenal. If you ever take pictures inside, you want this lens. If you ever take landscape shots, you want this lens.

I often take shots in restaurants and bars and what not, and this lens has quickly replaced my 35mm 1.4L as my go-to low-light lens. The 35 is very fast and the viewfinder is bright, but once light is too dim for auto-focus, the versatility of the 35 goes out the window. Instead of getting blurry shots, I just set the 10-22mm to focus on infinity, and, since it's so wide, everything is simply in focus (even wide open). The same is true of outdoor night shots. Landscape shots look great, especially if you can get close enough to certain subjects to have them distort (ie, trees).

All in all, if I could only have two lenses for an APS-C sensor camera, with money as no object, they would be the Sigma 18-200mm OS and this Canon 10-22mm. I would pay big bucks for a faster version of this lens.

I don't have too much to add to what has been said by others already, but I'll highlight a few points:

- Yep, it is a pretty expensive lens. Should be an "L" but canon refuses to put the L label on EF-S lenses. None the less, build quality is excellent and the optics are amazing.

- Remember, it is *extreme* wide angle, so when people say "ultra-sharp" they mean for an ultra wide. At 10mm f/3.5 the corners are going to be a bit soft, but the center is going to be razor sharp and that is truely brilliant performance for such a wide angle.

- The flare performance of this lens is amazing, it rejects flare like nothing I've seen before. Full sun in frame produces very modest flare. It performs much better than Sigma's offering in this respect.

- This lens is good enough that it cured my full-frame dreams and desires - at least for now :). Always wanted a 5D for my 17-40 but having seen shots from the 17-40 on a 5D and this 10-22 on cropped sensors I've got to say I don't feel I'm missing too much in the ultra-wide department now.

In summary, I felt a bit annoyed paying the price when I bought it, but having taken it on a trip and used it extensively I have no regrets now.

I coveted this lens when I first looked it, but didn't have the four-digit $$$$. But when Amazon offered it at a mid-three-digit price, Santa Claus had my order faster than Rudolph on a busy night.


Holds edges squarer (less round) than I expected letting me use "not much" Perspective correction in Photoshop.

This lens is a necessary lens for all types of photography using a 1.6 for factor Canon Camera. I am an event photographer, car shows, motocycle shows, etc. and it helps me get shots close up to displays where I might not get a good shot when people are always walking through your shot at crowded venues. Check my photos at the latest Auto show in D.C.!Canon EF-S 10-22mm f/3.5-4.5 USM SLR Lens for EOS Digital SLRs

I shouldn't have this lens. I originally planned to buy Sigma's 10-20mm. And I did, but after four copies with significant centering problems and a poor response from Sigma's repair service, I gave up.

This Canon is lighter than the Sigma and smaller than I expected it would be. The build quality is inferior to the Sigma. It would actually feel cheaper than my 28-135 IS if not for the tighter build tolerances. Focus is about the same for all three: fast, quiet, and accurate. The Canon has better colors and both of my copies were even across the frame at 10mm. The only letdown has been some blurriness in the corners, but nothing too extreme, and it cleans up by f/5.6.

At 10mm, the Sigma was equally good or better in the center, and better in the corners, but only over 2/3 of the frame. The remaining third, usually the left, would be hopelessly blurry. It cleaned up at 20mm. By contrast, the first copy of the Canon I had was fine at 10mm, but had some centering problems at 20mm. The second copy was noticeably sharper across the board (4 MB vs. 4.3 MB JPEG of the same frame), so I kept it.

If you're in very close quarters, this is a great walkaround lens. If you're not, it's not. I've found that it's excellent paired with the 28-135/3.5-5.6, or even better, the 24-105/4.

The only real problem with it is that it costs so much relative to the Sigma. Is it worth 50% more? Not if you can get a good copy of the former. I couldn't. If you value your time, then, it's probably worth every penny.

After spending a weekend shooting with this lens, I am sold. The color and clarity are outstanding; I had a 17-40 and sold it for the 17-55 IS because with a crop camera it just wasn't really wide. Recently added this to my bag and am very impressed. In fact, impressed enough to buy a second copy for my partner so we can each have this when going in different directions....a fair value for the lens. If not an EF-S it would be an L for sure. By the way, the hood for the 24-105 fits this lens so you really don't have to buy a separate one.

At 10mm the camera allows you to grab everyone into the group. You can become very creative with every objects you're trying to shoot. It's a very fun lense!

This lens takes fantastic pictures, but I recommend you don't purchase this lens unless you're also ready to purchase an external flash. When this lens is used in the 10mm-17mm focal length and the camera's built-in flash is used, the flash will cast a shadow on the picture resulting in severe light fall off at the bottom of the photo. You will need an external flash and bounce the light for effective indoor photos. If used without a flash or at greater than 17mm focal lengths you should have no problems at all. The quality of the lens is excellent and the focus is fast!

The Canon EF-S 10-22mm f/3.5-4.5 USM SLR Lens is the premier wide-angle zoom lens for the Canon 40D SLR. I purchased it after extensive research reading reputable reviews, including user experiences posted in photo forums. It has significantly less distortion at the wide end than any of the 3rd party lenses while maintaining better image quality. It is expensive, but I asked myself how long I would likely use it. Answer: the rest of my life! So I decided to not compromise and buy the proper lens for my 40D - and I haven't regretted it one bit.

I've owned this lens for two years and use it with my 20D. Not much needs to be said other than it takes amazing pictures.

Amazing for cramped cityscape conditions like our recent trip to (Old) San Juan. Very cramped streets require a very wide angle lens to simply take a picture across a twenty foot wide street.

Superb contrast and color saturation -- rarely ever fails to capture the scene in very low light conditions (such as deep forest cover in El Yunque in Puerto Rico) ... for which my Sigma 28-200 completely failed to deliver the goods when I needed it most.

this lens makes regular things.. amazing..
sometimes it gives grand feel.. sometimes it shrinks things down...
distortion that it creates isn't confusing.. its so much FUN

It is really very nice lens. I bought it to use as main "landscape lens", and I'm very satisfied: combination of extremely wide angle (+ zoom to select proper focal distance), huge depth of focus (small apertures), very good resolution and sharpness - do you need something else? I use it w/ and w/out circular polarizer, in both cases I had nice results.

Just as I expected. Outstanding Canon quality as always. Amazon service is always terrific!

About the only thing I would warn people about is that at the extreme wide angle setting, the lens casts a noticeable shadow when using the built-in flash.

I debated over purchasing this lens for the fact that it is an EF-S lens, and I hope to buy into full from sensors in the future. I finally decided to purchase this lens for the simple fact that it will be 3 or more years before I get a full frame DSLR, and I have suffered without a wide lens for far too long! I am so glad I made the purchase, it is very sharp and for all I can see, distortion free as well. It may seem pricey, but I think its fair for what you are getting, and keeping in mind the price of high quality standard EF lenses, this may be actually a bargain.

I'm a fairly serious amateur photographer, and have had mostly Canon equipment for 18 years or so. This lens has very good color balance, perhaps very slightly on the cool side. The lack of distortion for a lens this wide is pretty amazing. Things in the corners tend to distort the most, but even so, distortion is surprisingly low even at the 10mm end. Sharpness is mixed... At the 10mm end, the center of the photo tends to be very sharp (sharper than any of my other lenses in fact) and is reasonably sharp to the edges, but the corners are noticeably blurry even at F-stops in the middle of the range (which is where lenses are often at their best.) This may be a trait of ultra-wides, as I've seen it in other wide angle lenses. That issue goes away as the lens is zoomed away from the widest end.

Zooming and focus speed is Canon's usual impeccable quality.

I extensively investigated the Sigma 10-20mm as a cheaper alternative to this one, and was turned off by two things: the noticeably warm color tint and the quality control issues that Sigma seems to be having (my local camera store stopped carrying Sigma awhile back for this reason - too many returns.)

I got the sigma 10-20 first. It was defective with softness on left side. The replacement I got was soft on the left and the right side. I googled and found out this was a known issue, but their still out there.

I anted up and got the canon and well, it's glued to the body :)

QUALITY QUALITY QUALITY

I purchased this lens for my Canon 40D. You can get a less expensive lens which may be entirely satisfactory, but over the long haul the Canon EF-S 10-22 is by far the best choice. It is superior in every way.

This compact, extremely well designed and light weight wide angle lens should have been designated an L series lens. For all of the small sensor digital SLR cameras, this lens cannot be beat. It is fast, quiet, accurate and has an internal focusing system. When equipped with the 77mm UV filter, this lens is protected against dust and seals it from most of the rain showers one encounters in most photographic situations. My recommendation is to purchase a high quality filter as the optics of this lens deserves the best.
I use the 16-35mm f2.8 on the full frame 5D. For the occasions where a lighter, smaller camera is needed, the Rebel XTs, XTi, for example, the same range can be covered using the 10-22mm EF-S. The 20D, 30D, 40D, also, with their 1.6 sensor, will cover the same range when using the 10-22mm EF-S lens. It should be noted that the 10-22 lens is not compatible with the full frame cameras.
Some images obtained from this lens have, on occasions, rivaled images using the 16-35mm f2.8 with the 5D. No lens will be 100% perfect and you will learn through experience, that each lens will have strengths and weaknesses. Knowing what the lens is capable of and your skill as a photographer will always be the varying factors.
For the serious photographer, or an aspiring one, like myself, the super wide angle lens is a must have! I purchased this lens and its lens hood through Amazon. Like the other many products I have purchased through Amazon, both the service and product has been exemplary.
The 10-22 EF-S lens is truly a remarkable lens. One of Canon's finest in my opinion. If you are wanting a super wide lens, look no further as this one is by far the very best out there.

Never worry about having enough room to back up. Instead you have to worry about all of the things that are creeping in.

I love this lens and helps anyone be creative.

This is very good wide angle lens, well build. At 10 mm distortion is visible specially at the edges but at 15 mm is really minimal. I like this lens very much.

Who needs full frame when you can have ultra-wide and long telephoto. This lens is great. Focus is very fast, picture quality is excellent. It's a winner.

This is a fantastic lens, as everyone else here has already said. It's too bad that it's not a little faster at 22mm, but that's only a minor issue. At the wide end (10mm), you'll definitely get some fisheye effect, but this can play very well if you know how to use it.

If you're looking for a very distinct fisheye look, consider the Canon 15mm fisheye, which is also a great piece of glass. Canon EF 15mm f/2.8 Fisheye Lens for Canon SLR Cameras

Thrilled with the performance on this product. I only object to the fact that the lens hood costs extra. This is part of the product. Otherwise very pleased with this.

You will often hear others say that this lens is fun, and I totally agree with that. I may not know how to best use an ultrawide, but it has not stopped me from having fun with this lens.

Distortion is a problem with any lens this wide, but there are ways to manage it. It's not your ideal lens for shooting people (although usable at the long end) but great for indoors, landscape and groups. It's also the only one where I can get usable shots shooting blind (just raise it over your head and shoot type of shots).

My only regret is not getting this lens sooner. It's an expensive toy, but if you can afford it, you can take lots of fun shots with it.

I owned this lense for about a year and it does take nice, clear pictures. It is also a handsome lense with a strong, sturdy build that is still very light. However, it certainly has its flaws. First off, the barrel distortion at 10 - 12mm is almost completely unbearable if you trying to take a picture representative of what you are seeing. It flattens out the scene considerably making objects - like people - look one dimensional. Women - it straight up makes you look fat. This especially noticeable in subjects in the foreground of your pictures like: people, trees, rocks, even houses etc. Secondly, there is a considerable amount of chromatic aberrations when shooting landscape photography in the mid and background ranges. There are green and red lines around trunks of trees and outlines of mountains.

I also own a Sigma 18-200 and I am not saying Sigma make the same quality of lense as Canon, but that lense if particular took just as good as pictures for about a 1/3 less of the price. There is no doubt in my mind - of the ones I've use - I can say the majority of Canon lenses are considerably overpriced, but I go with them because there doesn't seem to be a better options for those who demand high optical quality and have a discerning eye. In the future I may consider a switch to Nikon, but kudos to Canon for providing absolutely outstanding customer service in product support.

I'v bought it for panorama pictures, great one!!!!!!! I've Rebel XT it shoots great pics just the amazing difference coooool, but the crop factor 1,6 make them a little bit smaller than on 5D but anyway I recomend recomend and recomend!!!

I got this lens to fill the gap at the ultra wide angle on the 40D. After researching this lens and the Tokina 11-16 f/2.8, I decided to go with the Canon 10-22. I saw the reviews that states the Tokina is the sharpest UWA zoom lens for Canon crop sensors right now, but I felt its zoom range was too limiting. After using the Canon 10-22 for a few weeks, here are my thoughts about the pros and cons.

First, the things I like about this lens. It is light with decent build quality, just shy of L quality. However, attaching a good UV filter should be sufficient to keep out most dust. The common 77mm filter size is also convenient. It has exceptional color and contrast. Center sharpness is very good and distortions are relatively low for this type of lens. USM makes focusing fast and quiet. It is compatible with Canon's DPP software for easily correcting distortion and CA.

Now for the negatives. Some chromatic aberrations are present when shooting high contrast areas at the wide end, although DPP is really good at removing most of it. Sharpness falls off as you move away from the center. Edges are a bit too soft for my taste. As mentioned earlier, build quality is decent but does not match L lens quality, which is disappointing considering the high price.

All-in-all, a good, fun lens that should allow you to be more creative.

So far I have not used this lens very much but it I have no complaints about it. I am looking forward to using it more on some future sightseeing trips.

I have been using this lens at weddings and simply love it! While there is a lot of distortion on the edge at 10mm (which should be expected, but still stinks), it makes for some unique images, especially when trying to take in the entire "scene". I have also used it to get large group shots when there's no room to back up. At one wedding, I overheard someone saying "that must be an awfully wide lens 'cause I can't get everyone in!" as he gave up and walked away. I had enough room on the edges that they could easily do an 8x10 crop if they wanted to. It's also fantastic for the bride's getting ready images when it's in a small room. What a useful lens to have in the arsenal!

The Canon 10-22 mm Lens does everything I had hoped it would do for my photography!

I use this lens quite often. This is the wide-angle zoom lens goes perfectly with my rebel xti. With this lens, I can fit tall skyscraper, wide landscape, room interior into one picture. The lens is very well built. One downside with the lens is the distortion on the wide-end. But I think this is inevitable in every wide-angle lens.

I purchased this lens to round out my lens collection since I already have a telephoto and a standard zoom. It takes amazing photos, probably the best quality of all of my lenses. Very little lens distortion, colors are vibrant, photos are extremely clear. Great fast focusing. Allows me to get the entire forest instead of just a clump of trees. Great for indoor shots of photos of buildings. It's not a walk around lens, I know, but it's sure tempting to use it as such.