I currently have a Canon 55-250 lens which is my zoom lens at the moment. I have the option to trade this for a Sigma 70-300 DG Macro. I'm debating this one as the Sigma would give me that little extra in terms of zooming capability however I'm not too familiar with Sigma lenses.
Does this seem like a fair swap in terms of lens quality? The 55-250 is a smidge more than the Sigma but I'm not too terribly concerned with that. I'll be using this on a T3i if that makes any difference.