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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 20 Jun 2011 (Monday) 16:32
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Fungus?

 
roosterslayer
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Jun 20, 2011 16:32 |  #1

So I was looking at my Takumar SMC 55mm f/1.8 and noticed there were a bunch of hair like fibers inside. Like a spiderweb. I'm going to assume this is fungus.

so... can the fungus spread outside the lens? i don't really care about saving the lens since i got it for free but i just dont want it to start spreading to my other gear or around the house or on me.

the barrel feels a little loose to (it jiggles) so i'm just worried that there's enough play to allow the fungus to escape out.


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ohata0
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Jun 20, 2011 17:18 |  #2

i've heard that if you have fungus on/in a lens, then you want to keep that lens in quarantine. Don't put it w/ your other lenses. So I'm guessing, based on that, that it could very well spread.




  
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phreeky
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Jun 20, 2011 17:28 |  #3

Note: I'm no biologist

My understanding is that the spores are pretty much everywhere. Certain conditions (high humidity for a sufficient amount of time) is needed for growth, and the coating of certain lens elements, particularly as used in my older lenses, is an ideal "food" for the fungus.

Me, personally, I wouldn't be too concerned about it spreading. But I would be worried about damaging the lens coatings badly, and so I would disassemble the lens and clean the fungus out. Have done it with one lens before but nothing like the one you're talking about, so I'm not sure how hard it would be.




  
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rick_reno
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Jun 20, 2011 17:32 |  #4

was this lens out in the rain? i wouldn't worry it spreading, it requires the right conditions to grow (moisture, warmth, etc).




  
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funkyfones
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Jun 20, 2011 18:01 |  #5

A good thing is to keep them seperate but spores are everywhere anyway, its more a matter of not leaving it in a dark, damp/humid condition. Better thing would be to open and clean, theres got to be tutorials somwhere


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Virto
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Jun 20, 2011 21:48 |  #6

Link to another forum, but, here's a guide

http://forum.mflenses.​com …paint-removal-t24042.html (external link)


Kelly - EOS 5D - EOS 40D - Rebel XS - EOS 10D - EOS 1D - SX230 - AE-1 - OM-1n - Minolta Himatic7 - EOS-1N
ABR800 - Several flashes, remote triggers, stands, too many and yet not enough lenses

  
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kitacanon
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Jun 20, 2011 22:02 |  #7

That lens is so old the fungus is probably dead, long dead, by now...


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Virto
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Jun 20, 2011 23:41 |  #8

Maybe, maybe not. Fungus can grow any time, especially if it's damp or humid and the lens is packed away in a case. The bigger issue is if the fungus etched the glass, at which point there is a chance it will affect IQ.


Kelly - EOS 5D - EOS 40D - Rebel XS - EOS 10D - EOS 1D - SX230 - AE-1 - OM-1n - Minolta Himatic7 - EOS-1N
ABR800 - Several flashes, remote triggers, stands, too many and yet not enough lenses

  
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roosterslayer
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Jun 21, 2011 03:43 |  #9

i got it second hand so i have no clue how long its been there. it was free too so i cant complain to anyone. i heard putting it in direct sunlight can kill the fungus but i have no clue. i have it in an old black pack in my closet. its not damp or humid (rarely ever is in sf) so i'm not worried too much atm. just wanted to hear some opinions. thanks guys!


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Fungus?
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