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Thread: Is this Fungus ? I canīt identify, need help

  1. #1

    Join Date
    Mar 2019
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    Is this Fungus ? I canīt identify, need help

    Hello guys, I have this lens and it has a strange appearing only at the edge of the front glass element. the problem is that it is inside two canada balsam cemented lens pieces. So I couldnīt take it apart to clean it.
    I just wanna know what this is and how I can remove it ( if needed or if possible )

    When I saw fungus it was all around over lens element but in this case itīs only at the edges and look like snowflakes...

    thanks

    Click image for larger version. 

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  2. #2
    Tin Can's Avatar
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    Re: Is this Fungus ? I canīt identify, need help

    Not on glass

    Black paint failure
    Usually a German lens

    Don’t worry

  3. #3

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    Re: Is this Fungus ? I canīt identify, need help

    Looks more like slight edge separation to me. I have a lens with 'Schneideritis' which doesn't look the same as this and is fundamentally cosmetic.

  4. #4

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    Re: Is this Fungus ? I canīt identify, need help

    Quote Originally Posted by Tin Can View Post
    Not on glass

    Black paint failure
    Usually a German lens

    Don’t worry

    Oh that would be so "nice"

    Yes it is actually a german lens. A Hugo Meyer Görlitz Doppel Plasmat. So you really donīt believe itīs some sort of fungus?

    My biggest anxiety was, that it would spread out or go on other lenses.

  5. #5

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    Nov 2017
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    Re: Is this Fungus ? I canīt identify, need help

    Quote Originally Posted by pgk View Post
    Looks more like slight edge separation to me. I have a lens with 'Schneideritis' which doesn't look the same as this and is fundamentally cosmetic.
    That was my impression as well: beginning separation.
    Expert in non-working solutions.

  6. #6

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    Re: Is this Fungus ? I canīt identify, need help

    Possibly the beginning of separation, but it looks drippy to me. Could it have been caused by a too wet lens cleaning attempt that caused seepage around the glass? Then it dried and residue remains visible.

  7. #7
    Tin Can's Avatar
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    Re: Is this Fungus ? I canīt identify, need help

    I first looked on iPhone and image was too small

    Now on big monitor

    not Schneideritis

    It always helps to give more info in the first post than later

    Good fortune to you

  8. #8

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    Re: Is this Fungus ? I canīt identify, need help

    Quote Originally Posted by Larry H-L View Post
    Possibly the beginning of separation, but it looks drippy to me. Could it have been caused by a too wet lens cleaning attempt that caused seepage around the glass? Then it dried and residue remains visible.
    Maybe. What do you exactly mean by "beginning" seperation? Could it be more worse in the end?
    I donīt know anything about seperation at this moment. Is it fixable, will it progress?

  9. #9

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    Re: Is this Fungus ? I canīt identify, need help

    It is patchy breakdown of the glue layer (canada balsam or early synthetics) which gives a Cloudy appearance due to separation of a solid layer on the surfaces of the two lenses. Could be due to drying out at sections of the very edge or some kind of oxidation process- again at the very edge. It grows inwards, like a bacterial growth or crystallisation! It will be a very gradual change ( over decades) and will probably be dependent on storage temperature.

  10. #10

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    Re: Is this Fungus ? I canīt identify, need help

    Quote Originally Posted by Steven Tribe View Post
    It is patchy breakdown of the glue layer (canada balsam or early synthetics) which gives a Cloudy appearance due to separation of a solid layer on the surfaces of the two lenses. Could be due to drying out at sections of the very edge or some kind of oxidation process- again at the very edge. It grows inwards, like a bacterial growth or crystallisation! It will be a very gradual change ( over decades) and will probably be dependent on storage temperature.
    Will Re-Glueing solve this problem? I mean if I seperate, clean and re glue them with canada balsam. Or will it happen after that again?

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