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TP: How to identify fungus...?

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paulofessel View Drop Down
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Post Options Post Options   Quote paulofessel Quote  Post ReplyReply Direct Link To This Post Topic: TP: How to identify fungus...?
    Posted: 23 June 2011 at 18:35
By request of stiuskr, here's one from my 11-months old SAL1680Z. You can read the full history here.



The pattern of this fungus is very different from everything I have ever saw. Whenever I saw fungus in my lenses, it either grew from the border of the glass or formed spots in very definite positions of the lens. In this case, it is spread throughout the second element in a quasi-periodic manner, as if it came from a lattice of spores.

Added info 06/24/2011: other Dyxum member has a lens that is suffering exactly the same issue. According to him, he already took the lens to a authorized service center and the fungus is forming between the two fused frontal elements, probably in the glue that joins them. I'm in southeast Brazil and he is in Australia, and we both have lenses with the dreaded S/Ns.

Edited by paulofessel - 15 August 2011 at 13:24
Fotki

α900+some FF glass
α700+some DC glass
KM5D, R.I.P.
 



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Blame View Drop Down
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Post Options Post Options   Quote Blame Quote  Post ReplyReply Direct Link To This Post Posted: 25 November 2010 at 12:22
I did read that microscope manufacturers are using slow release fungicides.

It does give one ideas. After cleaning the lenses, how about coating the inside of the body with a fungicide to prevent reinfection?

Warning : I have no idea if a commercial fungicide won't release anything (oil?, moisture?) that will screw up your lens anyway.   
A900, Min 24-105, 35-105, Samyang 14/2.8, 35/1.4, Sig 70/2.8 Macro, ISCO Ultra 125/2, Tam 180/3.5 Macro, Sig 400/5.6 TeleMacro
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nigelbrooks View Drop Down
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Post Options Post Options   Quote nigelbrooks Quote  Post ReplyReply Direct Link To This Post Posted: 21 November 2010 at 08:14
Good news, enjoy the lens
I've been away!
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youpii View Drop Down
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Post Options Post Options   Quote youpii Quote  Post ReplyReply Direct Link To This Post Posted: 21 November 2010 at 06:57
I went to a couple of 2nd-hand shops to get an opinion. It's only a large dust.
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horizon View Drop Down
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Post Options Post Options   Quote horizon Quote  Post ReplyReply Direct Link To This Post Posted: 18 November 2010 at 13:45
A number of years ago my old SLR 35mm film camera equipment got fungus in the lenses and body. I did attempt to try and resolve the fungus problem by placing in direct sunlight for about 30min a day, but the infection was gone too far. (I loaned the camera to a friend who lived in a rain forest area and the infection got too bad in about 3 weeks) The age of the equipment and replacement costs used made it not viable to clean.

Anyway now for future prevention I use Silica Gel packs that have a heating element in so when the gel needs to be dried, I can plug it in direct to power and these are then dry ready for the next session, drying time can be between 4 - 10 hours. They are affordable and easy to use.

For the Dyxum members in Australia, the dehumidifier versions that are dried by connecting to power are available through Bunnings for about $50. Also silica gel available link below and in bulk volume if required.

dehumidifier

Silica Gel

Regards,
Craig
Please dont edit my photo's
Wildlife Horizons
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youpii View Drop Down
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Post Options Post Options   Quote youpii Quote  Post ReplyReply Direct Link To This Post Posted: 18 November 2010 at 13:34
I bought it online. The seller says it's "just a big dust". I not sure if I should return the lens.
 



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nigelbrooks View Drop Down
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Post Options Post Options   Quote nigelbrooks Quote  Post ReplyReply Direct Link To This Post Posted: 18 November 2010 at 13:02
Strange to see one isolated 'fluffy' bit like that. It might just be 'big dust' and well worth a clean.

If you just purchased it, I would have a word with the seller.
I've been away!
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youpii View Drop Down
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Post Options Post Options   Quote youpii Quote  Post ReplyReply Direct Link To This Post Posted: 18 November 2010 at 12:47
I have "something" in the Minolta 16/2.8 that I just bought

Not sure if this is a small fungus or a thick dust. What do you think?
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conory View Drop Down
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Post Options Post Options   Quote conory Quote  Post ReplyReply Direct Link To This Post Posted: 20 July 2009 at 22:39
So leaving my lenses out everyday for about 30 mins everyday, will help reduce fungus ??

I think ill start doing this, my lenses are always left in their cases with UV filter and both caps on, is there anything wrong with this, fungus wise ??
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waleskeg View Drop Down
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Post Options Post Options   Quote waleskeg Quote  Post ReplyReply Direct Link To This Post Posted: 06 June 2009 at 13:33
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KoprivaMedia View Drop Down
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Post Options Post Options   Quote KoprivaMedia Quote  Post ReplyReply Direct Link To This Post Posted: 06 June 2009 at 09:12
Not that I've had any problems, but how easy is disassembly of more modern models? I ask out of curiosity, but in theory could you do the same thing with a lens made in the last few years?
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fophotofile View Drop Down
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Post Options Post Options   Quote fophotofile Quote  Post ReplyReply Direct Link To This Post Posted: 02 April 2009 at 21:53
No Biggie,

But one should consider that the fungus just loves the glue between doublets, and just about every lens has a doublet, so thinking I can clean this, is often those "Famous Last Words"..

Fear the Fungus

been there, done that..
regards
fo

Edited by fophotofile - 02 April 2009 at 21:54
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nigelbrooks View Drop Down
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Post Options Post Options   Quote nigelbrooks Quote  Post ReplyReply Direct Link To This Post Posted: 01 April 2009 at 09:38
Welcome to Dyxum Steve.

Brilliant idea! Especially those which have the 'hi-intensity' pods.

Remember though that this will affect only the visible fungal spores and not those 'tucked away' in helicoids etc.
I've been away!
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cooloregon View Drop Down
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Post Options Post Options   Quote cooloregon Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2009 at 08:24
Just a thought but how about a sun tanning booth.
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