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i didn't think they'd use crop bodies ... or see why they would. (the reach maybe?)
for the level of sharpness that it has (i guess not very for some copies?), and the f/2.8 and IS, i don't think there is another choice.
i actually read that that new sigma outperforms the 17-55 in some situations. but it almost always seems like a gamble with sigma's QC. then again, i don't even know if my 17-55 is actually sharp lol.
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