Glue in enlarger lens groups

Discussion in 'Darkroom Equipment' started by Volvospeed, May 16, 2008.

  1. Volvospeed

    Volvospeed Member

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    Is it really that hard to spot when it goes bad? Second enlarger lens that I have received this month that is supposed to be "Mint" "No mold" "no dust". I guess I should start asking is the glue is delaminating. Here is the latest sample:

    [​IMG]

    "Professional" photographer said he inspected it and its good as new. And people why why I think half the "Pros" are on that dust.
     
  2. John Koehrer

    John Koehrer Subscriber

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    Funky looking stuff. But I've never seen separation like that. Usually it becomes apparent around the edges of the elements, not scattered throughout the lens like that.
     
  3. Volvospeed

    Volvospeed Member

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    Have a old Nikkor that has that along with two ebay lenses now. I think my new rule of thumb is going to be no used enlarger lenses. I wonder if its age or heat thats causing it though. This lens was a fairly new Rodenstock so I am leaning towards heat. Who knows.