Jochen,
Dust gets in over time due to the movement of the internal parts, through
focusing and zooming.
The movement creates a vacuum.
Richard
----- Original Message -----
From: "Jochen Schiffler" <jochen.schiffler@xxxxxxxxxxx>
To: "Olympus" <olympus@xxxxxxxxxxxxxxx>
Sent: Thursday, June 13, 2002 12:37 PM
Subject: [OM] Bad luck on bay (?)
> Hi!
>
> Just got my Tokina 80-200 AT-X (about 166,- $US) from german bay.
> I heard of dust inside a lens but how the hell could this happen?
> http://www.1stlight.de/ebay/tokina80200.jpg
>
> The seller told me that he did not open it but mentioned he also bought it
> used (I can return it if I need).
> I'm curious if there's a way the hair(?) got inside WITHOUT opening it
> (maybe through zoom movement)? The glass seems ok and I wasn't able to
find
> any other evidence that it has been disassembled. No test shots yet but
what
> do you think?
>
> ...
>
> Damn, no luck for me today! Checked the Zukio 21mm f3,5 (same seller,
about
> 215,- $US) again and found that the focussing ring seems a little loose.
> Turning is smooth but it can be shifted slightly against the metal mount
> ring.
>
> Man, it took me some time to find this glass here in germany, I would not
> like sending it back again.
> Can this be fixed for little $ or should I return both lenses?
>
> Jochen
>
>
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