Remove lens hood (unscrews from knurled ring), remove set screws,
unscrew from lens group. Element 3 & 4 (cemented into a group) are
permanently mounted into the lens tube.
___________________________________
John Hermanson | CPS, Inc.
21 South Ln., Huntington NY 11743
631-424-2121 | www.zuiko.com
Olympus OM Service since 1977
Gallery: www.zuiko.com/album/index.html
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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