I have this lens and have a similar problem with the back of the first
group. I have cleaned it a couple of times and believe that the cause is
lubrication misting in the lens. Last time I checked it was about $75 to
clean at the Tokina Center which is about 2 hrs away from me. I plan to
take it down there but something always comes up either with the time
factor or money one. As to the seperation in the other elements I don't
have that problem. Knock on wood (head) John
> [Original Message]
> From: David Bell <deebel@xxxxxxxxxxxxxx>
> To: Olympus Camera Discussion <olympus@xxxxxxxxxxxxxxxxx>
> Date: 1/23/2010 2:05:55 PM
> Subject: Re: [OM] Tokins atx 80-200 f2.8 Zoom (long)
>
> John,
>
> I haven't used them however have heard them recommended before. You
decide.
>
> Dave
>
> http://www.optil.co.uk/
>
>
>
> -----Original Message-----
> From: JOHN DUGGAN [mailto:john.duggan10@xxxxxxxxxxxxxx]
> Sent: 23 January 2010 21:58
> To: Olympus mailing list
> Subject: [OM] Tokins atx 80-200 f2.8 Zoom (long)
>
> Hi all,
> Took my Olympus OM 4ti out for exercise yesterday. Pulled it out of
> it's case with minty Tokina ATx 80-200mm f2.8 zoom attached.
> Since buying this lens I have really come to appreciate it and would be
lost
> without it.
> Took a few shots, and realised that there seemed to be "ghosting" during
> focussing.
> Looked at the front of the lens to find a patch of what appeared to be
> fungus about 35mm in diameter in the front element group.
> The lens itself (bought from a listmember) about 2yrs ago is pristine!
Last
> time I used the lens about 5 months ago it was fine.
> UK importer wants £25, $40, to look at the lens. If they can get spare
> parts it will be £60/$90 labour PLUS parts and tax.
>
> I decided "nothing ventured nothing gained" and so proceeded to start to
> dismantle it! This was not as foolish as it sounds, the problem seemed
> "right at the front end"
> Tokina atx on e-bay seems to have exactly the same problem! 270516683772
>
> Undo 3 tiny screws and front cell pops out. The front cell consists of a
> cemented doublet and a second lens.
> The cement of the doublet had softened and run, and the "fungus" was
cement
> which had trickled down the rear of the element leaving filament trails
and
> had pooled in the centre due to the lens being stored face down. This
> cleaned off with no problem. However the doublet now shows signs of
> de-lamination with silvery patches between the elements.
>
> What to do next?
>
> Hope new elements are available, and that distributor will supply me with
> one to fit myself. New distributor, lens 15? years old?
>
> Look out for lens in Olympus fitting on e-buy and hope it does not have
> problems.
>
> Look out for lens in other fitting and either swop front cell into my lens
> or change my lens mount onto other lens. (if lens cell is good.)
>
> Get doublet re-cemented...if I can find a firm to do this.
>
> I cannot understand how the doublet has de-laminated. The lens was in
> perfect condition when I bought it. I have always used a front filter and
> have NOT used lens cleaner on it. Stored in spare bedroom, no real exremes
> of temperature. Has anyone had similar experience?
> Advice gratefully accepted.
> Any info on lens parts numbers would be VERY useful.
>
> Regards
> John Duggan,
> Wales, UK
>
>
>
> --
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