The 17-50 works great for follow cams, but I definitely wouldn't use a handle (assuming you mean a cam caddie/x grip thing) with a T3i. I guess it could work if you want to be able to get really low to the ground, or just for a better grip, but its not going to make your shots any smoother.
Just checked, and without a mic my t2i actually fits in my old opteka x grip, but it feels really sketchy and the thing bends a little bit, from the weight (or maybe just because the shitty quality)
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