Thanks, Chuck. I live in Arizona and keep all my cameras except large
format in my gun safe. The humidity is very low and the room where this
is stored is on the same AC unit as my darkroom which is kept at about
68 F, so it's fairly cool in here as well.
Gary
Chuck Norcutt wrote:
> Unless it's really huge you're unlikely to see any effect on the image.
> However, unless it's cleaned it may continue to grow. Store it in a
> dry place under 50% humidity. The illness is not likely to be catching.
> The spores were probably already inside the lens and may be inside the
> others as well. It's just a matter of temperature and humidity whether
> they have conditions favorable for growth. Keep them all dry.
>
> Chuck Norcutt
>
> Gary W. Marklund wrote:
>
>> Chuck,
>>
>> Ouch! It's down in the part where it starts to get complicated. Looks
>> like that entire assembly needs to be removed and then there are two
>> elements that are touching. That is where the fungus is. Think I'll put
>> it back together and run a test roll to see if I can see any affect on
>> the image. If not, I'll continue to use it, but store it way from my
>> other gear. If I see it on the image, maybe I'll see if John wants to
>> take a crack at it.
>>
>> Thanks for all your help.
>>
>> Gary
>>
>> Chuck Norcutt wrote:
>>
>>> Sorry, I don't know any details on the 300/4.5 but perhaps the exploded
>>> parts diagram from Mark Dapoz's site will help
>>> <http://olympus.dementia.org/Hardware/PDFs/300mm_f4.5.pdf>
>>>
>>> Chuck Norcutt
>>>
>>> Gary W. Marklund wrote:
>>>
>>>
>>>> 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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>>>>
>>>>
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>>>> 05:57:00
>>>>
>>>>
>>>>
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>>
>>
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>> 05:57:00
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