I'll give that a try this week. If the uv doesn't kill the buggers, the
heat will. It's been 115 F more days than I want to think about. Think
we are setting a record for most consecutive days at 110 F and over.
Gary
Chuck Norcutt wrote:
> 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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>>>>>>
>>>>>>
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