What's this?

Started Feb 9, 2013 | Discussions thread
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tintinstyle
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What's this?
Feb 9, 2013

Found this in the Defocus Control element of a 105 F/2 DC lens I recently got.

Is this Fungus or Internal Dust?

It looks too big to be a dust speck, but the shape doesn't look like a fungus either.

Can't see any impact to the IQ so far.

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