CanonEF-S 10-22 mm f/3.5-4.5 USM Lens

Build quality is very good, USM is very smooth and fast. Teamed with Canon 7D, the results are very sharp and impressive. The ultra wide angle allows a lot of the scene into the shot (that is A LOT) which is good for landscapes and arty portraits although don't get too close or the model gets a spoon face. Watch out for the tripod legs or your feet if shooting down. No noticeable vignetting or flare without the lens hood although that item makes the lens appear huge. I'm not sure wether it will actually do much. Forget the circular polarazing filter as the design of the glass on the lens causes dark and light banding in the sky, not sure wether drop in filters would be any different, I just bracket the shots and blend later. Recommended.

I analysed and analysed and thought and thought before I bought this lens. For over 6 months.The choices were the Tokina 11-16, Sigma and the canon. Numerous reviews available online as you may have experienced.I finally went for this knowing that all said and done Canon is dependable, was always the best or second best in this wide-angle category in the various reviews, great at handling lens flare and pretty low distortion, and of course, sharp, very sharp.Also, I have read in a few places that Canon have agreed that this is as good as an 'L' lens, just that they could not call it that because it is an EF-S mount.I am VERY happy with my decision!This lens is incredible. I can see the 'pop' in my pictures immediately.Very little to no flare, incredible sharpness and very very smooth.My camera - Canon 7D.If you have a cropped sensor and you're looking for a wide-angle, this is your lens. No reservations.Highly recommended.

I have had this lens for about 6 months now, so I have got used to using it and now feel ready to share my views on it. Reading reviews from various sources suggest varying opinions, mainly about its sharpness across the whole image, or rather lack of sharpness. My view is that this lens has some great advantages and some definite disadvantages - how seriously you take the disadvantages are very much up to the individual, or what you want to do with the images.First, the good things about this lens* you can capture very wide angles of any subject, which can be great for landscapes and architectural shots, for example. 10mm is very wide indeed, way beyond any kit lens capability. The good thing about this ulta wide viewpoint is that it can produce some very striking images both of landscapes and buildings...it can distort buildings wildly, but that's great if that's deliberate and you can produce some images that will make others go 'wow'.* The build quality is pretty good for a non-L lens* The USM (Ultra Sonic Motor) is pretty quick...and silent, funnily enough* The image quality and sharpness at the 22mm end is very goodThe not so good things are* At 10mm, you cannot get sharpness across the whole image, especially in the corners. The magazine and website reviews highlight this and, from what I have seen, this is true. This is why I could never give this lens 5 stars. I tend to find that this softness varies from shot to shot, but it's always there and can be quite bad at times. Sometimes I can get it quite sharp at the bottom corners of the image...at the expense of the top corners of the image. This can work on some landscapes if the top corners are just blue sky or clouds...but won't work on more detailed subjects.* Noticeable vignetting when at wide angles - can be removed in Photoshop, but still not great* I have a UV filter to protect the front lens element - and if I need to add a polariser, you can see the filter rim at the corners of the image on the wide angles. You might say I should remove the UV filter first, fair enough, but it's a lot of faffing about, especially if I have just swapped lenses.* The sharpness falling off from the centre towards the edges means that most of the wide angle images cannot be reproduced in e.g. poster prints or used on photography websites/stock sites because the image quality just doesn't cut it. They'd be rejected instantly.However, I have decided to keep the lens - mainly because the startling images it can produce at the 10mm end are sometimes worth putting up with the softness at the edges. I just can't do much with the images other than upload to the net at a smaller size, or just leave for my own enjoyment.It's a good lens to have in your kit....as long as you accept its short falls.

Was never impressed by this lens and sold it after about 6 months.

Using this lens on a Canon EOS 7D. This lens complements my Canon 18-200mm lens perfectly for those extra wide angle shots so often arising with buildings both internal and external. Distortion is to a minimum and the quality of the lens is suberb with, as to be expected, good depth of field. At 22mm absolutely perfect for taking close up shots of documents etc that cannot be scanned owing to bulk or location. Silent motor, lightweight and thus 100% satisfied.

Based on the reviews of this product, and a few issues with my kit lenses, I decided to buy this lens, and selected it above Sigma or Tamron equivalents. I used it for just over a week, in various lighting and at various apertures and focal lengths. The images that resulted were very poor. Sharpness was fine in the centre but deteriorated rapidly towards the edges and corners for all focal lengths and apertures tested. In many images this was apparent on my laptop screen without magnification! Having seen these results I immediately sent it back to Amazon and am awaiting a full refund. Perhaps I got a dud? Perhaps the other reviews on here are not based on examination of images at high resolution. Perhaps other reviews were not based on landscapes, the principal subject I photograph. All I know is that for the money, the lens I ended up with was unacceptable.As an update:I've checked a few discussions and groups on Flickr and found that many other photos taken with this lens suffer from the lack of sharpness I have experienced, and in some cases to the same or greater extent. Note that they all seem to be sharp in the foreground and in the centre. In most cases I have found they are shots in relatively low light, and at a focal length of around 10 mm and with a large aperture. Perhaps these conditions accentuate the problem.Check this out:[...]