This is my subjective opinion, even with this lens the rattle is due in the off state to the slats in stability, so no shortage (as well as the 19er 2.8er, I can live with this).
Interesting focal length, as well as the 19er at the OMD EM5, very good image quality, 2.8 light intensity is sufficient even in low light for sufficient reserves.
I am satisfied with two glasses and will keep gladly.