Any way of treating fungus inside lens without dismantling?

DayDreamer

DayDreamer

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John
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Pretty much as the heading.

I thought the lens took reasonable pictures as it was very cheap (Sigma 7-300) but since last using there has been a marked reduction in the IQ so I took my torch and looked inside and found a fine fungus covering an inner section covering most of the glass area.

Without taking it apart is there any way of treating it as I read UV can reduce the effect but?????????????????

Any help greatly appreciated.
 
There's the "old way" of sticking in it sunlight ...... google it to get different views ....... but once it takes over ... the spider web spreads
 
i took a lens of mine to a tanning booth! (Seriously!) The ultra strong UV light sorted it and no more spread!
 
uv will kill it and stop the spread, but the only way to remove it is to physically get in there and do it.
 
BillN_33 said:
There's the "old way" of sticking in it sunlight ...... google it to get different views ....... but once it takes over ... the spider web spreads
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Brazo said:
i took a lens of mine to a tanning booth! (Seriously!) The ultra strong UV light sorted it and no more spread!
Click to expand...

Alan Clogwyn said:
uv will kill it and stop the spread, but the only way to remove it is to physically get in there and do it.
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crofter said:
You could try this,not.o_O:eek:
View: https://www.youtube.com/watch?v=lrdkFXsr5Us
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woof woof said:
hehehe :D I like it :D
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hashcake said:
When he walks away, can I hear the sound of him lighting is crack pipe?
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Thanks to all of you and as I suspected from checking out Google it looks a lost cause. I looked at YouTube and saw folks taking their lenses apart, with specialist tools, but it is my cheapo lens so I'm not too bothered.

Thanks again John
 
Well since its cheap why not try take it apart :). The tools u need is a set of precision screw drivers - £5 from mapline. I got mine there and they gave me another set of something for free...so got a load of tools for £5
 
ricky1980 said:
Well since its cheap why not try take it apart :). The tools u need is a set of precision screw drivers - £5 from mapline. I got mine there and they gave me another set of something for free...so got a load of tools for £5
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Yes why not. I do have an assortment of such screw drivers. When I was young I was a great believer in take things apart and try but I am not so nimble fingered as I used to be. Thanks for making me think of trying.
 
DayDreamer said:
Yes why not. I do have an assortment of such screw drivers. When I was young I was a great believer in take things apart and try but I am not so nimble fingered as I used to be. Thanks for making me think of trying.
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Give it a go,I had some fungus on the inside of the front element of a 70-300 Tamron lens,luckily the front element just unscrewed so I cleaned it,never came back again,it sounds as if your problem is a bit deeper inside,nothing ventured etc.
 
minnnt said:
I would pay to see you roll into these John. :D
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No tanning booths around here - how abouts in S-in-A - do you spend time in them topping up your tan - to go with your good looks :whistle:
 
minnnt said:
:LOL: I'm not in S-in-A, I'm in K-in-A.

I use the real stuff. (tanning cream)
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Well Whatever in Ashfield - you should make allowances for my age :angelic:

I use the real'er stuff but less of it in these colder & cloudier northern parts than from where I moved from last year :(
 
Derek_W said:
W


What was he thinking? He should have shown how to dry them carefully with a blowtorch. It certainly works though. You can see the dirt floating on top of the soapy water.

I think in similar circumstance I'd try to dismntle and clean. There's probably a video on Youtube to help. https://www.youtube.com/results?search_query=+dismANTLE+Sigma+70-300
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Thanks Derek something for me to do - ugh - but worth a go (y)

The cleaning video is something you'd expect from DigitalRev TV but they would take apart with a lump hammer or pneumatic drill.
 
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Is the issue with fungus that it can etch the glass, so even if you remove it, it may be too late and the element might need replacing?
 
Vertigo1 said:
Is the issue with fungus that it can etch the glass, so even if you remove it, it may be too late and the element might need replacing?
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I once had a Leica lens that had fungus but it was worth cleaning professionally. Cost me £27, more than my week's wages, but it was a simple manual lens and it was in the 1970s. The coating was removed in the cleaning but there was no damage to the glass.
 
Vertigo1 said:
Is the issue with fungus that it can etch the glass, so even if you remove it, it may be too late and the element might need replacing?
Click to expand...

I once had a Leica lens that had fungus but it was worth cleaning professionally. Cost me £27, more than my week's wages, but it was a simple manual lens and it was in the 1970s. The coating was removed in the cleaning but there was no damage to the glass.
 
minnnt said:
You could use it to chock your wheel. Isn't that what old people do? You know, live in the past etc.

:D
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Well my car does have a starting handle - NOT - you cheeky b****r :p
I had to Google the word chock which must be a Northern Expression :LOL:

Could be handy on my wheely Chair for when my wife is staring in shop windows - on a hill - and lets go - wheeee down the hill I go :eek:
 
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