The reason for sticking with one focal length lens has great advantages. The 50mm is probably the closest to the human eye angle of view, discounting peripheral vision. But by sticking with one focal length, it allows you to experiment and realise the infinite possibilities in controlling view within the aspect ratio of the viewfinder, angle and perspective. A few days ago I was in a particular location for a couple of hours. After about an hour I found a viewpoint that I could never have found by just a casual visit to the location. It’s all out there; we just have to have the patience to find it.