Conclusion: good optics appallingly badly made mine fell apart within two years and the cost of repair was way too high. optics work well but are old fashioned and the price range given the quality of construction is far too high. this lens needs a serious design review and vastly superior construction. not recommended.
Summary: Is this supposed to come with a protector cap? I actually paid more and went out of my way to buy this lens at Abt instead of [@] for the customer service aspect - and hate worrying about scratching the lens every time I switch it since there is no protector cover. Seems ridiculous this wouldn't be included.
Conclusion: This lens failed to focus immediately after purchasing it. Canon wouldn't replace it, but did repair it. Worked fine and produced great images. That is, until today, when again the AF stopped working. If you search the net, you will find this is not uncommon.
Conclusion: Save your money for the L 1.2 instead. This one has serious focusing issues and started not wanting to focus at 6 months old. Then just after a year it has stopped focusing completely. I can't even focus it manually. I will be sending it in for repairs. On the bright side I loved it for the first 6 months. Hope it last longer after the repair!
Conclusion: It works for a few months and than you're stuck with a manual lens. Manual is OK, but you pay for an autofocus. You have to wonder why Canon still knowingly produces a lens that has such a short life, without fixing the problem.
Conclusion: I LOVED this lens for the 13 months that the AF worked. But it stoppped working and apparently a lot of people have had issues with this. Recommend using a hood even with storage if you get this lens. I've read elsewhere that light pressure on the front of the lens can make the AF fail.
Conclusion: I purchased the 50 F1.4 to compliment my new T2i for video. I have some very stunning enlargements hanging on my wall from this lens. My risk in buying this lens after reading reviews did not pay off. The lens focusing ability began to fail after 10 months. Service at Canon could not have been better and I received the lens back again working. The lens worked for a few months and the focusing does not work at the extreme ranges, manually or automatically.
Pros: great background blur, low light performance, great value, good lens for hi def video
Summary: Having also owned and used a Canon EF 50mm f/1.8 lens, I feel I can say the following. The f/1.4 can take great photos with pretty decent bokeh. The autofocus works very well and is fairly quick. Is it worth the extra price compared to the f/1.8? Yes and no. Your best bet would be to save up for the 'L' series f/1.2. The weight of the f/1.4 is about right, it has a metal camera mount and uses 58mm filters. The build quality is horrendous for a $300 plus lens.