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  1. #1

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    Is this fungus or what?

    Last weekend I took the RB out for a walk and as I was shooting I noticed that the 127mm had a lot less contrast than the other two lenses (65mm and 180mm).
    When I got home, I checked and the lens has this haze on the inside surfaces of the lens elements. Nothing like clumps,but just this smooth fog on the glass. It wasn't there when bought the lens 2-3 years ago,it seems to be quite recent.
    Now the question is: Is this typical of a fungus or could it be lubricant vaporizing on the glass, and what can I do about it. I figure repairing it is going to cost more than what I would pay for a new one,but I want to know what is up with it ,and do I have to worry about the other lenses . They are in the camera bag in those squares of fabric that you wrap around the lens. I do leave a lens on the camera though, usually the 65

    Thanks
    Rob

  2. #2

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    It sounds like lubricant haze, since it's even. Fungus is never an even haze. Just unscrew the cells from the shutter and clean them.
    Storing lenses in a warm environment can cause this, so can storing lenses wrapped in a synthetic fabric, or a camera bag - plasticisers can be miserable to get off glass surfaces.

    Lubricant haze results when the lube in the shutter starts to creep and break down. It can also be the result of using the wrong lubricants in a half a$$ed CLA.

  3. #3

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    Never thought of opening the thing myself--Well if it seems easy I will attempt it. If it starts getting complicated, I'll save it for those who know how
    thanks for the advice
    rob

  4. #4

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    Quote Originally Posted by R Paul View Post
    Never thought of opening the thing myself--Well if it seems easy I will attempt it. If it starts getting complicated, I'll save it for those who know how
    thanks for the advice
    rob
    You can easily unscrew the front element and then can get at rear through shutter. Not a big deal.
    * Just because your eyes are closed, doesn't mean the lights in the darkroom are off. *
    * When the film you put in the camera is worth more than the camera you put the film in... *
    * When I started using 8x10, it amazed me how many shots were close to the car. *

  5. #5

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    Usually fungus exhibits a branching structure. A uniform haze may be from lubricants.
    Last edited by Gerald C Koch; 04-30-2013 at 03:19 PM. Click to view previous post history.
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

    ~Antoine de Saint-Exupery

  6. #6

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    Quote Originally Posted by Jeff Searust View Post
    You can easily unscrew the front element and then can get at rear through shutter. Not a big deal.
    Both the front and rear cells will unscrew from the shutter. I wouldn't reccomend reaching through the open shutter to clean the inner surface of the rear cell, there's too much chance of leaving something in there or damaging the shutter/aperture blades.
    It may take some more-aggressive-than-lenscleaner solvent to remove the haze. Try isopropyl alcohol (rubbing alcohol, 90%)

  7. #7

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    Well I did take the lens apart and it seems the cloudiness is in the cement between the back lens elements before the shutter. So I guess that's that ,I just wonder how it went all at once and so uniformly. But I did learn how to disassemble a lens (and put it back together again)

    Thanks for everyone's help
    Rob



 

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