Excerpt: One small impact on the front element and the lens can be focus stuck. Worst case: MF will also not work. It's a flaw in the design which bends internal parts. There is already a redesigned part to fix that problem but you never know when the design change was flown in production. <br />To prevent damages: buy the hood and keep it always on. It will protect the lens system of any impact.
Excerpt: One small impact on the front element and the lens can be focus stuck. Worst case: MF will also not work. It's a flaw in the design which bends internal parts. There is already a redesigned part to fix that problem but you never know when the design change was flown in production. To prevent damages: buy the hood and keep it always on. It will protect the lens system of any impact.
Excerpt: I was not impressed with this lens physically. The focus ring was very loose on my model, with a significant amount of play. Overall it felt very cheap and fragile. Not really what I would expect from Canon in general. Optically is was what I would expect in the price range. Quite good, but nothing particularly outstanding. I couldn't get past the physical issues, so I swapped it for the Zeiss 50/1.4, and never looked back.
Summary: I researched this lens extensively. I was aware of the auto focus failure but saw so many good reviews on amazon that I jumped. My copy was defective. It is amazing that canon knows about these problems but doesn't change the design or improve on their quality control. The issue with my lens is that it does not focus through the finder. Up close it rear focuses. Past 10 feet it front focuses. Very frustrating. I never had this issue with a canon lens.
Excerpt: The lens was purchased to be used as a portrait lens primarily for my family. I was very disappointed in that to capture one person, you had to be at least 12 feet from subject. A group photo would require a ballroom size room. I was also very disappointed in the lack of sharpness of the eyes. To get the image tack sharp I had to use a tripod and manual focus. With the shallow depth of field, this was a very tricky adjustment.
Pros: Reasonable price
Cons: Auto Focus Accuracy, Lens To Subject Distance, Slow Focus
Excerpt: I purchased this lens because it is much cheaper than the 1.2, which I heard has lots of focusing problems. Well, this one isn't any better. I can't shoot anything under 2.0 without it being very soft. If I need to shoot wide open, I can't because the picture will come out blurry. Yes, I know that lenses are always sharper a few stops up. These are even soft when using a tripod and a high SS. I'm wondering if maybe I got a bad copy???
Excerpt: Not a good lens. Serious problems with AF. After a while of use (in each user may vary), the MF and AF locks being unusable. That happened to me at 5 months of use. I live in Chile and its repair is very expensive. Not worth it. The optics are not bad, has pretty good results, but its failure opaque photographic results.
Excerpt: This lens is sharp, quick, and notorious for its flimsy build. Don't be surprised if yours doesn't last any longer than mine did. On an APS-C body I got wonderful available-light travel portraits with gorgeous out-of-focus backgrounds, and stunning short-tele landscapes and city shots. After about two years, it stopped focusing. The repair cost half as much as the lens did. It worked fine ... for another year. Now it's broken again, on a trip of course.