As far as I can see, the main difference between the two versions of this lens is a stop button on the VR11, and as it is approximately £100 more on used prices, is it worth paying the extra just to prevent zoom creep? I would appreciate any comments from owners of both versions, particularly on the issue of zoom creep. I carry my camera on a standard strap with the body hanging in the "normal" position as apposed to hanging lens down, would the zoom creep be much of an issue?