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PostPosted: Sun Oct 02, 2011 10:21 pm 
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Location: somerset, England
Today I nearly bought a 50mm F1.4 lens for £6, I see the price of a good Lens would be £150-£300
The advert said it had a haze on the inside front lens, or it could be fungus?
Now knowing a great deal when I see it! I thought If I could clean it somehow and it was haze inside I should be on to a winner. :lol:
(And I have never Opened up a lens before.)
Would you have ago at cleaning it, and getting some experience in how the inside works.
I did not get it in the end it went for £30 with the postage. :evil:

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PostPosted: Sun Oct 02, 2011 10:43 pm 
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I wouldn't get one with known fungus. It could spread to other lenses if you're not careful. Cleaning might or might not be possible depending on where the fungus is. If it happens in the glue between optical elements then forget it. Also fungus is said to be able to "eat" into the glass so even if you could remove it, it may leave marks.

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PostPosted: Mon Oct 03, 2011 1:51 am 
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For under $10, I might buy the lens just for the sake of taking it apart, even if it's optically useless. (That said, I didn't know that fungus could spread to your other lenses. Good to know.)

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PostPosted: Mon Oct 03, 2011 7:43 am 
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Popo, have you heard anyone ever microwave one , just a thought, it should not damage the glass but kill the fungus?

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PostPosted: Mon Oct 03, 2011 10:47 am 
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metal + microwave isnt a good idea, probably wouldn't kill it either


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PostPosted: Mon Oct 03, 2011 11:56 am 
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Microwaves work by heating the water. I'm not sure there's much water in fungus anyway...

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PostPosted: Mon Oct 03, 2011 1:22 pm 
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I was just thinking of microwaving the glass lens, this is what i found on the webb.
"The time of microwave irradiation could be changed for different species as we have had satisfactory amplifications".

http://www.fgsc.net/fgn43/ferreir.html

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Last edited by blindasabat on Mon Oct 03, 2011 1:54 pm, edited 1 time in total.

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PostPosted: Mon Oct 03, 2011 1:54 pm 
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blending it would be fun. :twisted:

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PostPosted: Mon Oct 03, 2011 6:22 pm 
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I bought a pair of coated binocs (7x50) with severe fungus. Took the whole thing apart, cleaned it, and now I have a professional pair of binocs for 10 bucks.

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PostPosted: Mon Oct 03, 2011 6:25 pm 
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What causes the fungus?

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PostPosted: Mon Oct 03, 2011 9:31 pm 
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Trapped moisture, some bad luck and time. :wink:

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PostPosted: Mon Oct 03, 2011 9:43 pm 
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@Citruspers

What did you clean it with? and could you see any marks at all.

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PostPosted: Mon Oct 03, 2011 9:54 pm 
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Cleaned it with isopropyl alcohol/ethanol, 85% pure I think. Works very well, as long as you don't breathe the fumes :lol:

It didn't leave any marks, really, perhaps some wipe marks that would dry up in time.

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PostPosted: Tue Oct 04, 2011 7:15 am 
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Anybody heard about freezing it in a sealed bag?

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PostPosted: Tue Oct 04, 2011 9:30 am 
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You should check out of cold temperatures fungi can take first, some can take a fair bit.
http://www.shroomery.org/forums/showfla ... er/6161463

And there is the problem of additional moisture when you thaw the lens again. To circumvent this I think one needs to remove as much air as possible from the plastic bag and lens itself before freezing.

And even if the freezing works, you only succeed in killing the fungi, not removing it.

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