I shoot with this lens for thousands of shots of my grandsons sporting events. I am using an X-T2 and have had the combo for probably 4-5 years, I have no play between the camera and lens. I use a mono-pod for nearly all shots, and Idonotice some rotational movement between the two, there is no horizontal movement of play between the lens and camera. If you are not having the issue with other lens', then the lens mount plate out be loose. As mentioned before, you need to get this looked at in order to get in-focus results.