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Re: [OM] Question on Zuiko Pro lens construction tolerance

Subject: Re: [OM] Question on Zuiko Pro lens construction tolerance
From: Wayne Shumaker <om3ti@xxxxxxxx>
Date: Fri, 28 Aug 2020 15:07:41 -0700
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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