I was a news photographer in the 70s. Most of the time I carried a Leica with a 50 or 85, and an Olympus with a 21. That covered most of what I needed to do. The reason for the 21/SLR combo was accuracy in framing near things against far is more touchy and the SLR gives the real story, and because the Leica with an accessory finder wasn't that fast, anyway. I had a lot of other lenses, but rarely used them because changing lenses took too much time.