That is one great shot of Nationals Park! Phil employed his trusty fisheye lens to get nearly the entire seating bowl of the stadium into one shot. A fisheye lens is an ultra wide-angle lens which gives a 180 degree view. It’s a fairly specialized lens, and few photographers use them. This is mainly because the distortion that is created can become a tiresome effect and people lose interest in using it. Also, such a wide-angle lens is not useful in most situations. However, when employed properly, like the shot above, the results are outstanding!