I'm still very new to photography and will be going to an orchestra concert tomorrow night. It will be outdoors and will have venue lighting. My friend will be performing in it and asked me to take some photos. I could just go with Auto or P, though I'm hoping someone can give me some basic tips/advice. I am using a 5DM3 and have access to a EF 24-70mm 1:2.8 L USM and a EF70-200mm f/2.8L IS II USM.
1. How do you white balance since the lighting might constantly change during the show?
2. Any best guesses as to where I should set the ISO?
3. Any other basic tips?
Thanks for any info.