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  1. #1

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    Is This Lens Fungus?

    Hello all,

    Please could you look at the pic in the link below and tell me what you think the marks in the upper right may be. They were extremely difficult to photograph and this is the best attempt out of 20 or so. The pattern covers about 100 degrees in terms of rotation of the lens and extends about 15 - 25% toward the centre. The marks have an odd 'three pronged' pattern and are denser in number toward the outer edges. Is this fungus?

    http://farm4.static.flickr.com/3440/...0536e5ff_b.jpg

    Steve.

  2. #2

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    This could be oil, is it yours ? Brand ? Maybe you could clean this yourself.

    Fungus tends to be denser and no specs, some wire type image like fractals.

    Peter

  3. #3

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    It's a Nikkor 105/2.5. Mine as of this morning - a second hand buy from a UK shop (via the telephone).

  4. #4
    Ian Grant's Avatar
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    I'd call the shop, you may need to send it back, the photos are difficult to asses, but from your description it might be fungus.

    Ian

  5. #5

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    Where are the spots ? On a lenssurface or inbetween them ?

    Basicly I would unscrew the lensmount and take it off and than see how easy I could remove the rear lens part.

  6. #6
    Ian Grant's Avatar
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    Don't tamper with the lens, that's bad advice as the shop won't take it back if there's signs you've tried taking it apart.

    Ian

  7. #7

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    The spots are on an internal lens surface. I think I'll call the shop Monday - pity, the lens feels nice and I was keen to try it out tomorrow.

  8. #8

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    Quote Originally Posted by perkeleellinen View Post
    The spots are on an internal lens surface. I think I'll call the shop Monday - pity, the lens feels nice and I was keen to try it out tomorrow.
    The fungus I have seen looks like fine threads from a spider's web all over an intermal lens surface.

    Surprisingly, people report that they can still get "good" images with such lenses.

  9. #9

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    Quote Originally Posted by Galah View Post
    The fungus I have seen looks like fine threads from a spider's web all over an intermal lens surface.

    Surprisingly, people report that they can still get "good" images with such lenses.
    I've shot a few witha Zeiss that is full o fungus... as long as the subject isn't backlit, no worries. Backlighting however brings the fungus full force and the photos show it quite terribly. Also that looks more like a problem with the coating, not fungus. I'd still contact the shop though.

  10. #10

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    from my knowledge of the nikon 105 they are some what prone to oiling up (popular hard working lens) like the others the fungs affected lenses ive seen look like little spider webs

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