<span style="font-size: small; font-family: Times New Roman;"]The 24-70/2.8L is already a rather large and heavy lens, coming in at just over 2 lbs. I think the primary reason why Canon did not make it IS is because it would become even heavier. So if the rumors are true, either Canon dida complete redesign that would keep the weight reasonable, or it's going to be a 3-lb. lens. Those of us who have been clamoring for a 24-70/2.8L IS might think twice if it's heavy....just a thought.