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Re: [OM] Lens Fungus

Subject: Re: [OM] Lens Fungus
From: "Gary W. Marklund" <gary@xxxxxxxxxxxx>
Date: Sat, 18 Jul 2009 14:55:44 -0700
Chuck,

Thanks for the very helpful reply. Unfortunately, it isn't on the 
outside. Good news is, I got the name ring off without incident or slip. 
Also, the second ring. I'm still digging. The third ring seems 
different, if there is one. I don't see any slots to take a spanner. 
Looks like I'm getting close to the fungus, but don't know how to remove 
the third element. Any ideas?

Thanks again,
Gary

Chuck Norcutt wrote:
> Depends on what you consider "salvaged".  If the fungus hasn't been 
> there very long and is not widespread you may be able to clean it off 
> without any apparent ill effect.  But fungi exude acids that will etch 
> whatever they're living on.  Fortunately, life as a fungus doesn't 
> proceed at anything like a torrid pace.  I have cleaned fungus spots off 
> a couple of lenses where I can't tell there was ever anything there... 
> meaning I can't locate exactly where the fungus was.
>
> If it's on the outside you are lucky and can easily clean it.  If it's 
> on the inside you may not be able to do anything.  According to 
> discussions that were going on here recently the 300/4.5 has a tendency 
> for the name ring to be assembled with glue and too much of it at that. 
>   It may be next to impossible to unscrew the name ring to get the lens 
> open for cleaning.
>
> When cleaning fungus I have used John Hermanson's suggested method which 
> is to use a dab of women's cold cream.  I think he specified "Pond's" 
> brand but I used whatever my wife had in her cosmetics drawer and it 
> worked fine.  The other cleaner (taught by the Olympus factory "sensei") 
> was "nose oil".  That's exactly what it sounds like.  Skin oil picked up 
> by rubbing your finger on the tip of your nose and then rubbing your 
> finger tip on the fungus spot.  Skin oil (fortunately for us) has 
> anti-fungal properties and the tip of the nose is liberally supplied 
> with oil glands.
>
> Chuck Norcutt
>
>
> Gary W. Marklund wrote:
>   
>> I have an Olympus Zuiko 300mm f/4.5 that has a couple of fungus "stars". 
>> Does anyone know if this is salvageable? I only discovered them when I 
>> went to list the lens for sale.
>>
>> Thanks,
>> Gary
>>
>>     

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