Disclaimer: I am not an event photographer, thought I have done a little bit of it.
I think this is clearly a two-lens scenario. You'll want fast and wide for capturing the stage environment, and fast and moderately long for more intimate imagery of the performers. At the distances you're talking about, and with a 1.5x crop camera, the 17-50 may be *just* wide enough, but may leave you wanting some more coverage. For the longer end, a 70-200 equivalent would be ideal, and ideally have IS (VR) as well. The Sigma 50-100 seems like a really interesting option; maybe a little short on the long end, and no VR, but 1.8 makes for some interesting possibilities! |
