When upgrading from the EOS 60D, you won't miss a beat thanks to the seamless integration of nearly all of the 60D's most important features and the streamlined process by which you may switch between photo and video capture. There is a lot of literature extolling its virtues. Hence, I see no reason to restate myself. I can declare with certainty that its technical capabilities extend beyond those of the crop. Given the price differential between the 5D Mark3 and this lens, it's a win for the body. If it's not working for you, it's not working because there's nothing here to sustain it. You can upgrade to a 5D Mark3 for another $25,000 if you're not satisfied.
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