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I was really curious about this lens after reading this <a href='http://www.tamronlensreview.com/tamron70300vcreview'>Tamron 70-300 VC review</a> because I wanted to know if it was worth upgrading to this model. I owned the older model without the vibration compensation but if this was the only new feature, I did not think that it would be worth buying the lens again. According to the review, I read Tamron put a lot more effort into this updated version however and