high stephen
i have experience on about 5 shows previously
1st try yielded crap results, through trial and error and evalauating previous results i get closer to nailing it
i use the 70-200vr
firstly i decide to see how much of the stage i can fit within 70mm then move back or forward to get the whole stage in frame
i first started with vr on in low light 1/125 but to freeze action 1/250 (vr off)minimum is required to compensate for that high shutterspeed i use f2.8 and high ISO from 800 to 3200 depending on the scene usually theatrical lighting is harsh but it's also dark and moody so the trick here is high ISO
r
canon users can shoot comfortably at iso1200 noise handling comparable to iso 400 on a nikon
i use a focus method of 'single area focus' and AF-C and focus on the subject i want, i get subtle DOF and sepeation of main subject and background, in some situations id rather shoot at f4
aperture or shutter priority
modes don't work and aren't reliable in this sort of situation
I use manual exposure settings
white balance is always set on 3000Kelvin for halogen type spotlights
but if i want it cooler i go down to 2700K
still working on my technique though
every situation is different