Excerpt: When I first purchased the lens I was very happy. I had to adjust to some features and soon found out that my Tiffen variable ND filter did not work well with the wide angle, needless to say I was very upset because I do alot of photography on the water. Only after 4 months of using my new lens it started creeping down when in use, I also shot from on high straight down or product photography.
Excerpt: Lens is faster auto focus, overall good photo results. But went to faulty in less than 2 years - power diaphragm issue. While search the issue on website, found this is common issue with this lens for many years. Why canon you didn't take an action - looks like only this lens is faulty for many in the L series.
Conclusion: Lens is faster auto focus, overall good photo results. But went to faulty in less than 2 years - power diaphragm issue. While search the issue on website, found this is common issue with this lens for many years. Why canon you didn't take an action - looks like only this lens is faulty for many in the L series.
Excerpt: I replaced my 24-70L with this lens on a full frame 6D n order to get the slightly farther reach and less weight, sacrificing f2.8 fro f4 which I hoped iS would compensate. The lens is sharp and the IS works fine, but on a full frame sensor it has awful vignetting. I've returned two copies of this lens already and my current copy only shows it on the top left corner at 24mm.
Excerpt: Amateur; arguably an enthusiast, but admittedly not the most educated. The lens doesn't perform as expected considering the investment. My Canon 10-22 noticeably outperforms. Not a recognizable step up from my kit (18-135 on a 50D). I eventually grew frustrated enough that I sent it in to Canon for diagnosis. It came back, indicating that they fixed a defect that I didn't complain of, and there was no mention of any diagnosis of what i actually complained of.
Excerpt: I must have received a lemon but this lens combined with my 5Dii is completely unacceptable. Soft focus, "whites" tend to blead!, noticeable and random vignetting. This lens is [*]. This will be going back to be exchanged. If I see the same issues I will be returning my entire order. I didn't pay $3k for gear that my D90 can out perform.
Pros: Durable, Easily Interchangeable, Fast / accurate auto-focus, Strong Construction