I was asked to take photos during an upcoming recording sessions for a neighbor who happens to be a great artist. At any rate I'm working with a 50d and have narrowed my choices down to two lenses; 17-55 f/2.8 is and the 24/70 f/2.8 is. Space is limited so I don't want to be peigon holed with a prime and the lightining won't be all that bright. I also don't want to bring my flashes as it might interfere with the artists. Am I on the right path and if not let me know your opinion.