A good goal. Certainly louder than motorized SSM Sony and plastic is not very flattering. But on the other hand, the device becomes light compared to 16-50 and it's fun. Further development in MF ring is very soft and rubber contour is convenient for fingertip handling. Some tests with the opening 1.8 is conclusive. Anyway who did not necessarily want to put 400 to F1.4, it will be enough to start with low light without flash