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Title: Definitely worth it.
Review: I own a lot of L series lenses from Canon and love this lens. I used it for a year on my 40D and was pleased, not extatic. Upon upgrading to the 5Dm2 I became extatic. The quality is great on a crop factor but when you compare it to the full frame, you will notice the difference.I also own the 16-35 f/2.8 and if you can afford it, that is the better lens to go with it. The price does correspond to the quality (in my opinion).Overall, I think that anyone buying this lens will be very happy, full framers more so than crop factor types.
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