Hello, I just purchased the D7200. I use the 50mm and I love it, but I am wanting to get another lens. What would be a good choice for taking portraits? I want to be able to get more in the frame rather than having to back up 10 miles to get everyone or the whole body in the shot. Any recommendations? Also I am only looking for auto focus. I do not want to have to be in charge of the focus on my end adjusting the lens.