Yashicamat 124G lens marks -- what is this?

Discussion in 'Medium Format Cameras and Accessories' started by lbloom, Jan 19, 2012.

  1. lbloom

    lbloom Member

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    Hello all,

    I bought a Yashicamat 124G, and was examining it. When looking through the taking lens on bulb, a prominent streak is seen.

    1 o'clock:
    A.jpg

    From the back; 11 o'clock:
    B.jpg

    A closer look. 1 o'clock on both.
    C.jpg

    D.jpg

    Is this fungus? When viewed from the back, it is behind and close to the rear element.

    I gather that it is relatively simple to open this lens up, but I don't own a wrench spanner, and do not want to tamper with it unless I decide to keep it.

    Any idea or comments would be helpful. Thanks very much.
     
  2. Chrismat

    Chrismat Subscriber

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    It does look like it could be fungus. I've never attempted to try to remove fungus before but you could try to call Mark Hama, he does a great job repairing Yashicas, especially TLRs since he used to build them in Japan. It's easier to speak to him over the phone than e-mailing him. You can get his phone number at www.markhama.com
     
  3. johnielvis

    johnielvis Member

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    likely fungus---if I'm right that is....

    the lens just needs a cleaning to determine...however

    since the lens is a tessar, the front elements are not cemented, but the rear are---and the fungus attacks the cement as far as I know exclusively....since it's on the back element--the rear 2 are cemented the front 2 are not, then it sure seems like that's the culprit....

    hey--I need to clean mine...it's got dust in there--just bought it....if you figure out how to take it apart easily...like maybe from the back get the rear out with a spanner, let me know ok
     
  4. tkamiya

    tkamiya Member

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    I don't know about cement but fungus also attacks coatings, such as multi-coating. I hear they are yummy. :smile:

    To me, it looks like combination of dust, oil residues, fungus, and multitude of contamination. It definitely needs cleaning. To me, the fungus part does not look bad. On photo 3, there is a big thick streak at 1 o'clock. That one is definitely fungus.

    I've taken lenses apart and cleaned them myself. Depending on how much you paid for the camera, you may or may not try this yourself.

    If you have a chance to return it, I would. 124Gs are available fairly reasonably these days. Professional cleaning will likely run you decent amount of money.
     
  5. Dan Daniel

    Dan Daniel Subscriber

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  6. lbloom

    lbloom Member

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    Thanks for the comments and wealth of information, folks. Much appreciated.
     
  7. Kevin Kehler

    Kevin Kehler Member

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    I had very similar marks on my 124G - the shutter is noted for throwing off oil over time. So don't necessarily jump to fungus although it does look like that to me; however a good repair shop should be able to clean it properly. It was about $60 for my repair guy to work it over but I haven't had an issue since.
     
  8. johnielvis

    johnielvis Member

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    heY...thanks for that link!!!!! I even have a proper spanner--this should be an easy job to clean mine!!!!!