Good point WayneS, I just checked a Lumix 12-60 with OIS and it rattles a
little off the camera, but seems good when mounted on the camera and powered
on. I thought the control system for the OIS might hold some bits firmly
in position but on further investigation I think it has to do with the
aperture mechanism.
...WayneH
> -----Original Message-----
> From: olympus <olympus-
> bounces+wayne.harridge=structuregraphs.com@xxxxxxxxxxxxxxxxx> On
> Behalf Of Wayne Shumaker
> Sent: Saturday, 29 August 2020 8:08 AM
> To: Olympus Camera Discussion <olympus@xxxxxxxxxxxxxxxxx>
> Subject: Re: [OM] Question on Zuiko Pro lens construction tolerance
>
> At 8/28/2020 12:37 PM, Larry wrote:
>
> >I just purchased a refurbished M. Zuiko 12-100mm lens directly from
> Olympus. As soon as I unboxed it today, I heard a rattle sound if I
shook the
> lens. It appears that the extending lens tube (the piece that gets
longer
> when you zoom the lens out from 12mm) is a little loose. The rattle is
more
> pronounced at 100mm than at 12mm. Is this normal, or have I received a
> lens that is not as tight as it should be?
> >
> >Similarly (or maybe coincidentally), about two weeks ago I noticed a
similar
> looseness in the extending tube of my 12-40mm M. Zuiko lens when it was at
> the 40mm end. I had not noticed that before. After seeing this problem
> on the 12-100mm lens, I gave a closer look at my 12-40mm lens, and saw
that
> the extending tube was loose and rattled at all focal lengths, though more
> pronounced at the 40mm end. Again my question is: Is this normal and I
> just hadn't noticed it before, or has something loosened up, and the lens
> should get maintenance? The 12-40mm is about five years old, and I
> purchased it new. For whatever it is worth, the looseness and shaking is
> much less noticeable in the smaller lens.
> >
> >Advice, please?
>
> I have no experience with those lenses. Only question I would ask is does
it
> go away when mounted on a camera and camera powered on? If still rattle, I
> would definitely say the lens has a problem.
>
> WayneS
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