Foggy lens

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Peter Egelston - 01 Dec 2004 18:13 GMT

Good afternoon:

I am hoping someone could refer me to a company that can re-polish a
projector lens. It is used in a 35mm display projector that is exposed
to some rather extreme envorinmental conditions. Over time, the
original coating on the lens has gotten foggy and no amount of
hand-cleaning seems to make it go away. Rather than purchase a new
lens (that may end up suffering the same fate), I was hoping I could
send it out to get the surface cleaned or re-polished. and help or
leads would be appreciated. Apologies in advance if these groups are
not the most germane for this post.

p-

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RSD99 - 01 Dec 2004 19:47 GMT

You might consider posting this to

news:rec.photo.equipment.large-format

Several of the regulars in that forum know a **lot** about all kinds of
lenses.

> Good afternoon:
>
[quoted text clipped - 9 lines]
>
> p-

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Bob Monaghan - 01 Dec 2004 23:25 GMT

see http://medfmt.8k.com/bronrecoatings.html on cleaning etc.,
also http://medfmt.8k.com/mf/repairtools.html on cleaners etc.,
also yahoo egroups camera-fix mailing list archives on lens cleaners etc.

hth bobm

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* Robert Monaghan POB 752182 Southern Methodist Univ. Dallas Tx 75275 *
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Bernard P Rother - 02 Dec 2004 07:12 GMT

> Good afternoon:
>
[quoted text clipped - 9 lines]
>
> p-

Although I haven't had a projector lens cleaned I've had about 3 lenses
dismantled and cleaned over the last few years. My 80-200 and 50mm both
had a sort of "mist" inside. ( I live near the coast ) The other lens
was a 400mm mirror lens which had a fungus growing on the rear mirror. I
had given up the mirror lens for lost, thinking that because the silver
coating is on the front of the material and the fungus was spreading on
top of that, they wouldn't be able to get it off.

I found a guy who did camera repairs from his garage ... setup was
pretty clean and organised so I wasn't too concerned. Anyway, all 3
lenses came back in "mint" condition and I was very impressed with the
results and fee charged was R50 per lens. ( about $8.00 )

I'm willing to bet in your case that the fog will be on the inside of
the lens.

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Charles W - 02 Dec 2004 08:19 GMT

> Peter Egelston wrote:
> > Good afternoon:
[quoted text clipped - 22 lines]
> lenses came back in "mint" condition and I was very impressed with the
> results and fee charged was R50 per lens. ( about $8.00 )

Whoah there! R50 as in South African rands? If you're in Cape Town, and the
guy just moved there within the past year, I think I know the guy you mean
and he's but damned good.

> I'm willing to bet in your case that the fog will be on the inside of
> the lens.

Yes, but you can't expect everyone to be up to the standard of who I suspect
you mean. The Johannesburg photographic community grieves of his departure.
--
'Kay,
Chiz!
Chas.

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Bernard P Rother - 03 Dec 2004 07:25 GMT

>>>Good afternoon:
>>>
[quoted text clipped - 36 lines]
> Chiz!
> Chas.

Hi Chas,
He is Geoff Young and now lives in George. Does a lot of work for the
insurance companies as well. One camera he got in for a report said "the
camera had been damaged". I'm not kidding but it looked as though
someone had punched a screwdriver through the lens ... right through the
mirror & curtain etc.
His son Robert does mountain biking with us.

Bernard.

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Mike King - 03 Dec 2004 06:08 GMT

You didn't specify what kind of lens or projector, my personal feeling is
that if the lens in question has been in service a long time and if new
replacements are available at a reasonable price you should just retire the
old lens.

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darkroommike

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> Good afternoon:
>
[quoted text clipped - 9 lines]
>
> p-

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