That's very interesting. I'd have said it's impossible to have a lens
with fungus in Arizona or Nevada. Of course, dark is also a good
environment if you're a spore. Some folks believe in bringing the
lenses out into the sun and giving them a good UV treatment for several
days.
Chuck Norcutt
Gary W. Marklund wrote:
> 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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>>>>> 07/18/09 05:57:00
>>>>>
>>>>>
>>>>>
>>> ------------------------------------------------------------------------
>>>
>>>
>>> No virus found in this incoming message.
>>> Checked by AVG - www.avg.com
>>> Version: 8.5.375 / Virus Database: 270.13.19/2245 - Release Date: 07/18/09
>>> 05:57:00
>>>
>>>
>
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