A very good deal for a series lens L with quality manufacturing on top which revealed the full potential of my Canon 450D. Pictures beautifully rendered confirm that investment in a very good target bonus on the case, the reverse is never satisfying. An excellent device will be constrained by a medium quality lens. I had been seduced by the announced benefits of the Sigma 17-70 F2.8, very bright and decorated with stabilization ... in this case the couple Sigma / Canon did not work (development problem and motion / made very means) I traded after two days without regret for what Canon who will accompany me for a long time after changing my 450D. A real investment.
