Apaflo wrote:
Use the zoom.
When you set up the shot take the characteristics of your lens into consideration. Using zoom to frame your image stay far enough away to avoid having anyone all the way to the edge. Also consider that the plain of focus is not flat, and bends towards the camera at the edges; hence if you have four rows of people make each row shorter, with one or two fewer people on each side, as you go from front to back.
Agree. Unless the group is really small, the 50 won't cover it. When shooting groups it's very important to maintain close proximity to the people so you can interact/communicate with them. People photos improve dramatically with this human contact