Summary: I like this lens. I purchased this as my Rebel did not come with a wide angle lens. The only con I can see is that you can't zoom in and out only focus at one distance (Only reason it is a 4 star rating). It would be nice to be able to zoom in closer and still get a wide angle shot. The pictures are very clear and amazing how much you can get in the picture.
Excerpt: I bought this lens for the incredible price and with intentions of using it for landscape on a recent trip. I loved the results I got shooting in daylight as well as at night time. While it has a limited range being a fixed lens, I love the challenge and have gotten some pretty incredible shots with it! For the price of this wide-angle lens, it is definitely worth it!
Pros: Consistent Output, Fast / accurate auto-focus
Conclusion: I've had the EF 20mm/2.8 for about four years. Can't be happier with it, except maybe I'd like a smaller, lighter version. You just can't have it all. The performance is very good. Edge sharpness, on film or digital full frame, shows some softness wide open, but it crisps up very well by f/4.0. Focusing is fast and exact. I keep a filter on mine always, no signs of additional vignetting caused by the addition of a full thickness filter.
Summary: That is the question with this lens. I was looking for a cheap and light wide angle for my gear bag that wouldn't make me cry if it was broken. I'm a wedding photographer, and so it is a little different for me when I go out shooting. I am not just taking photography gear with me, I am taking my livelihood . Cheap was the name of the game, but I knew I wanted a prime lens due to their quality, wide aperture and lack of bulk.
Conclusion: Reading previous reviews about this lens, I was very timid to purchase this lens, but I needed a wide angle lens and this was in my price range. The auto-focus is a little slow in low light [but most lens are] and the crispness of an image at f2.8 takes a little more effort, but overall I think it gets the job done, takes wonderful landscape photographs, and for this price, I don't think you can get anything better.
Excerpt: This lens is worth every penny I paid for, I simply love it. The pictures taken outdoor are sharp and crisp,good even in low light. Had same good experience indoor. A certain degree of distortion was anticipated, but I was pleasantly surprised<br />how little it is.
Pros: Consistent Output, Easily Interchangeable, Fast / accurate auto-focus, Strong Construction