It is not about getting a better lens, Bill. It hardly ever is. It usually is about trying our "another lens". Why else would anyone own many lenses of the same focal length?! It is curiosity on some lenses and the wish to experience many lenses. I am not the only person here who tries out lenses for the sake of trying out lenses. I prefer my CV 50/1.5 over the CV 50/1.1, and I prefer both over the 7Artisans 50/1.1. I prefer my Rigid Summicron 50/2 over these three lenses. Recently, I purchased a Hexanon 50/2.4 ltm. I have wanted to try out this lens for several years. Now I use this lens. I have quite a few 50mm RF lenses, and I love using them. Which lens is "the best"? Often, the answer depends on what the user likes to see in the resulting images.