70-200 f/2.8 shootout: Canon vs Tamron vs Sigma (the after discussion)
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Order the Tamron 70-200 on Amazon at http://help.tc/t200
Order the Sigma 70-200 on Amazon at http://help.tc/s200
Order the Canon 70-200 on Amazon at http://help.tc/c200
Order the Tamron 70-200 on Amazon at http://help.tc/t200
Order the Sigma 70-200 on Amazon at http://help.tc/s200
Order the Canon 70-200 on Amazon at http://help.tc/c200
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