Fungus in lens help.

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revjohnk

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John
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Hi hope this is the right section. Yesterday I discovered the dreaded spiders web evidence of fungus in one of my lenses. A Sigma 135-400mm 1:4.5-5.6D APO. Not exactly a top class piece of equipment, but it's mine. I have always kept my lenses properly packed away when not in use and this lens is only about two years old - and hence out of warranty. Has anyone any advice, can it be cleaned or should I just scrap it or sell it on ebay for a low price? Anyone know any places west of Plymouth who might deal with it?
Thanks for your help.
John K
 
keep it away from your other kit would be the obvious advice :)
 
I guess the question is does it affect the quality of the image. If not then do you need to do anything about it :shrug:

Nick
 
Don't know if there's any truth in it, but I've read that exposure to ultraviolet light for a period of time will do it. Don't know how long. I vaguely recall a few days on a sunny window ledge - which could be a problem here. So that leaves one of those sun lamp things that you might get off ebay perhaps if it's cheap enough to give it a go.
 
MisterE said:
Don't know if there's any truth in it, but I've read that exposure to ultraviolet light for a period of time will do it. Don't know how long. I vaguely recall a few days on a sunny window ledge - which could be a problem here. So that leaves one of those sun lamp things that you might get off ebay perhaps if it's cheap enough to give it a go.
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Already sat on my window sill - but even if it kills the fungus (which is affecting focussing) it will not remove the tracery.
Thanks though for suggestion.
 
John,

I would get it seen to as soon as possible, if the fungus is there it will grow in the right conditions ie cold and damp. have you ever left your lens in your car or somewhere else that tempertures can change dramatically?
 
Donki said:
John,

I would get it seen to as soon as possible, if the fungus is there it will grow in the right conditions ie cold and damp. have you ever left your lens in your car or somewhere else that tempertures can change dramatically?
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I think it is warmth and damp not cold and damp that is worse.
 
I was meaning that when a lenses is stored somewhere cold there can be a problem with condensation causing th damp, I noticed it when I left my camera in a cold car overnight and hen brought it inside. Looked in the viewfinder all I could see was a blur took due to condensation, soon cleared though but I'd say if it was a comman occurance you could have problems.
 
Donki said:
I was meaning that when a lenses is stored somewhere cold there can be a problem with condensation causing th damp, I noticed it when I left my camera in a cold car overnight and hen brought it inside. Looked in the viewfinder all I could see was a blur took due to condensation, soon cleared though but I'd say if it was a comman occurance you could have problems.
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Yes, that must be the worst conditions. Take a cold lens out on a humid day which allows moisture to form on/in the lens and then bring it in and store it in a warm atmosphere.
 
Donki said:
John,

I would get it seen to as soon as possible, if the fungus is there it will grow in the right conditions ie cold and damp. have you ever left your lens in your car or somewhere else that tempertures can change dramatically?
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Normally in my camera backpack behind the sofa in my study unless I am carrying it. Oops, did I take it to the tropical biome at Eden - no, I don't think I did. Now that is somewhere where condensation is well and truly present. I watched a lady with a very large Canon wasting a whole packet of tissues trying to keep the condensation of the front of her big lens. I advised her to sit down and wait and it would clear itself.
 
Dont ignore it.. thats bad advice... it can be cleaned if caught early enough but caught too late or left and it cant.. I bought a lens from company X (used) who said it was clean.. it had fungus.. the company paid to ahve it cleaned but i was the one to sort it so i found out the perils..
 
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