I bought my 12-40 along with my E-M5 mk II a few weeks ago and have a few worries: - The inner barrel wobbles slightly at certain FLs (eg. 1-2mm when fully extended), found other threads saying this is normal so no worries I guess. Just brought it up here so that everyone can grasp the whole picture. - When I manually focus using the focus by wire (ie. not when using the mf clutch) the lens makes a electric clicking sound (it's not the aperture blades btw). - AF motor sounds quite alot more than the 40-150 PRO and MSC primes. Not that it's really loud, just louder than the mentioned lenses plus I was under the impression that it would be equally silent as those. Should I try to get the lens serviced by olympus under the warranty or should I be content? (ie. is this normal?) And do your copy of the 12-40 exhibit the same attributes? All in all I'm very happy with the lens.