I am going to shoot a concert in a concert hall this weekend specifically for one of the percussionist. He wants pictures of him. I will be in the Control/lighting booth and the theature is not huge. I am wonderig though is 200mm going to be enough to get a decent shot of him. I know Im not going to be able to get right in his face but I am looking to get shots of him where he can be clearly identified and his body and instrument fill the frame. What is the maximum distance I can be from him to get these results?