I needed a lens for a crop "for every day", compact, lightweight, so that you can always carry it with you, especially when traveling. At first I bought a 24mm STM, I was very disappointed, as they already wrote here with it "the soapy scene is coming out. soapy, cheap, whale", I sold it without regret. Then I took this one, a little expensive of course, but I am completely satisfied and almost never take it off the carcass. All successful shots!