I believe they mention this in the commentary for this movie – and I think I also heard this from some FX podcast, but what I believe that they did for this and an earlier scene with similar zooms was to get three cameras mounted on the same piece of hardware and shoot the scene/camera move simultaneously with all three at multiple levels of zoom. Then, in post, they digitally transitioned between these wide-mid-close shots.
I’d recommend the DVD, btw. Zack Snyder does the commentary, and it’s got some pretty good stuff in it.