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Thread: Is this the first sign of fungus?

  1. #1

    Default Is this the first sign of fungus?

    I recently bought a lens through BNS and went overseas immediately after. Just came back and took it out of the dry cab to have a closer look. Saw a tiny white spot behind the front element - when looking through the lens from the rear as i turn the focus ring, it eventually starts to look a bit like a spider web. but the spot itself, when viewed from the front is really tiny. just a dot.

    is this the first sign of fungus?

    thank you.

  2. #2

    Default Re: Is this the first sign of fungus?

    Quote Originally Posted by rijac View Post
    I recently bought a lens through BNS and went overseas immediately after. Just came back and took it out of the dry cab to have a closer look. Saw a tiny white spot behind the front element - when looking through the lens from the rear as i turn the focus ring, it eventually starts to look a bit like a spider web. but the spot itself, when viewed from the front is really tiny. just a dot.

    is this the first sign of fungus?

    thank you.
    picture or everyone is going to play guessing games.

  3. #3

    Default

    Spider web is usually fungus and not dust...
    D700 - 24-70mm F2.8 ED - 105mm VR2 Micro - Samyang 14mm - 50mm 1.8D - Mb 10 - SB900 - SB400

  4. #4

    Default Re: Is this the first sign of fungus?

    Quote Originally Posted by rijac View Post
    I recently bought a lens through BNS and went overseas immediately after. Just came back and took it out of the dry cab to have a closer look. Saw a tiny white spot behind the front element - when looking through the lens from the rear as i turn the focus ring, it eventually starts to look a bit like a spider web. but the spot itself, when viewed from the front is really tiny. just a dot.

    is this the first sign of fungus?

    thank you.
    If it really looks web-like, then very likely its fungus

  5. #5
    Moderator daredevil123's Avatar
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    Default Re: Is this the first sign of fungus?

    Quote Originally Posted by rijac View Post
    I recently bought a lens through BNS and went overseas immediately after. Just came back and took it out of the dry cab to have a closer look. Saw a tiny white spot behind the front element - when looking through the lens from the rear as i turn the focus ring, it eventually starts to look a bit like a spider web. but the spot itself, when viewed from the front is really tiny. just a dot.

    is this the first sign of fungus?

    thank you.
    Sounds like early stage.. get it cleaned fast, and it will be ok. If you wait too long and let the fungus grow, the acidic secretions from the fungus will eat away at the coatings of the lens.
    Last edited by daredevil123; 12th October 2011 at 08:45 AM.

  6. #6

    Default Re: Is this the first sign of fungus?

    thanks all. looks like i need to pay nikon service a visit.

  7. #7

    Default Re: Is this the first sign of fungus?

    confirmed fungus spot. sent for cleaning. two weeks. don't know if can remove it completely - hopefully yes. thanks for the inputs.

  8. #8
    Moderator ziploc's Avatar
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    Default Re: Is this the first sign of fungus?

    Next thing to check is whether your dry cab %RH is ok.

  9. #9

    Default Re: Is this the first sign of fungus?

    Quote Originally Posted by ziploc View Post
    Next thing to check is whether your dry cab %RH is ok.
    reading is firmly between 45 to 50% don't see a problem. i've had my dry cab for 2 years already. checked all my other equipment too. this is the only one with an issue. fungus doesn't happen overnight either. i suspect it was an existing problem.

  10. #10
    Moderator ziploc's Avatar
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    Default Re: Is this the first sign of fungus?

    Quote Originally Posted by rijac View Post
    fungus doesn't happen overnight either. i suspect it was an existing problem.
    That's what I think too, but it's better to be safe.

  11. #11

    Default Re: Is this the first sign of fungus?

    i have three hygrometers in my dry cab.

    All three have different readings. the one that is one the dry cab door reflects the lowest humidity (i.e. dangerous!)

    Eventually I bought a $70 analog hygrometer and placed it at the bottom of the cabinet - furthest away from the drier and ensure that I take readings from there.

  12. #12

    Default Re: Is this the first sign of fungus?

    Quote Originally Posted by ziploc View Post
    That's what I think too, but it's better to be safe.
    lesson learnt. i suppose thats the risk with buying used lenses. i've sent the bill to the seller! up to his conscience i suppose. but i'll have the cabby checked in any case.

  13. #13

    Default Re: Is this the first sign of fungus?

    Quote Originally Posted by metalgear View Post
    i have three hygrometers in my dry cab.

    All three have different readings. the one that is one the dry cab door reflects the lowest humidity (i.e. dangerous!)

    Eventually I bought a $70 analog hygrometer and placed it at the bottom of the cabinet - furthest away from the drier and ensure that I take readings from there.
    thanks. might be worth considering given the value of the stuff in there now!

  14. #14

    Default Re: Is this the first sign of fungus?

    sigh. nikon called me and told me its not fungus after all. just dust and returned the lens at no charge. but i still see this tiny white dot on one of the inner elements. now what? lol

  15. #15
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    Default Re: Is this the first sign of fungus?

    Quote Originally Posted by rijac View Post
    sigh. nikon called me and told me its not fungus after all. just dust and returned the lens at no charge. but i still see this tiny white dot on one of the inner elements. now what? lol
    Did you try to ask what is it? Anyway, if it don't affect the pict, should be fine...
    Too many great equipments but too little quality photos. [My Flickr] | [My Blog]

  16. #16

    Default

    Quote Originally Posted by rijac
    sigh. nikon called me and told me its not fungus after all. just dust and returned the lens at no charge. but i still see this tiny white dot on one of the inner elements. now what? lol
    Shake it like a polaroid picture!

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