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How to clean fungus ?

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Sandyw View Drop Down
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Post Options Post Options   Quote Sandyw Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2011 at 17:54
Similar to 5th Elephant I have had success using Distilled Vinegar - it seems to shift fungus that neither distilled water (a much overlooked solvent), Lighter fluid or alcohol will move. So far had no return of fungus in any of the lenses that I have cleaned.
A700 A900 A77 A99 & a bunch of Sony & Minolta AF Lenses

NEX-5n NEX-7 [Canon EOS 5D] plus a menagerie of MF lenses



 



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Retyred View Drop Down
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Post Options Post Options   Quote Retyred Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2011 at 09:25
Coincidentally there is a 2-page article in this week’s copy of the UK journal Amateur Photographer about lens fungus, its cause and treatment and a general guide to dismantling lenses. The major problem is that a severe attack may have damaged the lens coating and even etched into the glass itself, potentially leading to major optical defects. For a mild attack the author advocates leaving the lens exposed to full sun with the aperture wide open; UV light may do the trick. Some of the posts above advocate a more powerful method. Otherwise the lens has to be dismantled; the author advocates brushing the elements with a 3% hydrogen peroxide solution to kill any fungus. However, as he points out, if the glass has been damaged, that may be too late.
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Jocelynne View Drop Down
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Post Options Post Options   Quote Jocelynne Quote  Post ReplyReply Direct Link To This Post Posted: 16 June 2011 at 06:19
A lame joke which only has meaning in English, because it is based on a pun:

A mushroom walks into a bar. The bartender demands that the mushroom depart the premises, because the mushroom makes trouble and causes conflicts. The mushroom is a bad for business. He is not welcome at the bar.

The mushroom protests. He says, "I do not make trouble in this bar. I am a fun guy."   
Maxxum 450si, Sony A300, A700, A900 and a cubic meter of Alpha lenses
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skm.sa100 View Drop Down
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Post Options Post Options   Quote skm.sa100 Quote  Post ReplyReply Direct Link To This Post Posted: 16 June 2011 at 13:09
Is there a US based member who is willing to take on the task of cleaning a lens? I have a Sigma 70-200/2.8 with suspicious looking spots and I'm hesitant to open it up myself, having no experience in this matter. Sending it to Sigma will easily cost me half the cost of the lens. If there's someone who can do a cleanup willingly, I will be willing to give it a shot.
That rings a bell, actually. I think there's a Chicago based store who does this and is either a member here or has been recommended on this site before. Anyone remember who that is?
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fem2008 View Drop Down
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Post Options Post Options   Quote fem2008 Quote  Post ReplyReply Direct Link To This Post Posted: 23 June 2011 at 05:20
Try Lecher on this forum. PM him. He is in Pennsylvania and does good work. He can use any extra work right now as well.

Originally posted by skm.sa100 skm.sa100 wrote:

Is there a US based member who is willing to take on the task of cleaning a lens? I have a Sigma 70-200/2.8 with suspicious looking spots and I'm hesitant to open it up myself, having no experience in this matter. Sending it to Sigma will easily cost me half the cost of the lens. If there's someone who can do a cleanup willingly, I will be willing to give it a shot.
That rings a bell, actually. I think there's a Chicago based store who does this and is either a member here or has been recommended on this site before. Anyone remember who that is?
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Pirate View Drop Down
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Post Options Post Options   Quote Pirate Quote  Post ReplyReply Direct Link To This Post Posted: 15 July 2019 at 07:15
Ahoy mateys!

Well shiver me timbers, it's been a fair while since I had anything of value/worth to say, and I'm continuing with that for now as I'm after input from anyone who has either done their own barnacle cleaning and to remove those crusty crabs!

I've bought a MIN 2x TC that has some unwelcome stow-aways and I want to make them walk the plank and send them down to Davey Jones's Locker. If the suggested methods that are found online and have video footage to follow actually work, such as using a tool to remove the front securing ring, point the front element down and the glass front element will fall out and then wash the glass with warm soapy water and a white vinegar or other solution to remove any specs from the wash process and re-fit or using hot towels and putting copper coins inside one and putting the lot into a sealable poly bag and leaving as apparently copper is a natural fungus killer and no need to dismantle the optic as a couple of examples I've seen on YouTube.

I haven't heard of a TC succumbing to the Plague and I'm wondering if it can be dismantled easily to access the guts of the thing (or not), so if there's an accepted method that's known to work, can you direct me to the video or place where I can take a look?

Cheerio, bye-bye, ta-ta!
 



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neilt3 View Drop Down
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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 15 July 2019 at 08:57
I stripped down a Minolta 2x teleconverter to clean haze out of it .
A simple job to do as long as your methodical .
As you take it apart make sure to place each element the right / same way up in order as they came out so they go back in the same was up and in the right order .
While I can't remember how I took it apart , at most I used an adjustable lens spanner ( with the two prongs ) the rest would have either undone by hand or dropped out.
While cleaning it's important to note which side is which .
The only issue I had was that part of the old ribbon cable snapped , it was very brittle .
I couldn't find an old teleconverter to salvage the contacts and connections to repair it , so bought a programmed chip off James Loa .
Chip I got reports itself as 600mm f/4 so I can use it on my Minolta 300mm f/4 lens and still have AF .
see my photostream on flickr;
http://www.flickr.com/photos/neilt3/
C & C welcome.
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