Stage photography is truly hard. I personally liked the 5th one from the bottom best, the motion blur looks great. The 55 - 200 mm lens tops at around f/5 which is really quite a slow lens for the purpose. I've been trying a bunch of different lenses and the best one is still the 70 - 200 f/2.8 IS, a pricey and heavy putty - white behemoth, impossible to carry all day, not sure it's something I'll buy.
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