Is this lens fungus?

Started 11 months ago | Discussions thread
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Emeraldforest
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Is this lens fungus?
11 months ago

I bought this nikon 35mm f/2 AI lens in September from ebay from a seller with 100% feedback, with zero negative or neutral feedback.  The lens is in excellent condition, aperture works perfect, each f/stop is super snappy, glass is free of scratches....a pretty nice looking lens.  I was happy.  I did not do a close inspection with a flashlight and I did not catch this.  But I caught it now and I am curious what the hell is this on the edge of one of the elements?  I keep my lenses in a humidity controlled cabinet that I created and I know that this could not have happened on my short ownership.  Is that fungus?  I always thought fungus had a spiderweb type growth, not blobs.   Is it element separation?   I would love to know what you think.

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