Great lens, bought it for x-t10. Sharp already at f / 2, this is my first fujifilm glass, I can only compare with canon 35mm f / 1.4 (used on 60D) On canon, I rarely had to shoot at f / 2 and more, mostly f / 2.2, opening stronger often smeared on focus, XA and soap (maybe the hands are crooked))). There are no problems at all with Fujik at f / 2 ! Addition: I tested it at a wedding and a wedding, the lens is beyond praise ! If someone does not hold the lid, put the hood that is included, the lid is like a glove in it)