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Old Feb 6, 2008, 7:55 PM   #1
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I'm planning on selling a lens, but I noticed something that's on an internal element. I'm scared that it's fungus, but it appears too dense and not branched to be fungus. In my opinion, it looks like a piece of fabric or a dead insect. Either way, I can't get rid of it, so I'll have no choice but to sell the lens as-is.

Below is a photo of the speck in question, taken from the front of the lens with my kit lens.

What do you think it is?

- Jason
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Old Feb 6, 2008, 8:17 PM   #2
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it's some kind of debris. who knows, but it's not fungus. i can guaranty that it will have no effect on IQ whats so ever..

ro
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Old Feb 7, 2008, 1:54 AM   #3
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This is a rather common issue with older lenses, and as Roy says a small speck won't affect the images at all. Especially if it is closer to the front element and not on the rear.

Kjell
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Old Feb 7, 2008, 2:25 PM   #4
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Unfortunately for me, it's closer to the rear element. I haven't seen any adverse effects through my DSLR, but I'm pretty sure full-frame cameras will notice it.

- Jason
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Old Feb 7, 2008, 3:42 PM   #5
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very doubtful.
it might show up at f22+ but even then i doubt it.

roy
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Old Feb 7, 2008, 11:55 PM   #6
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It is probably a flake of the internal anti-glare coating which has sloughed off. Try gently tapping the lens against your hand (with the flake on the lower side) a few times and see if you can't dislodge it and get it to drop to the side of the lens where it can't be seen.
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Old Feb 8, 2008, 8:43 AM   #7
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I've always wondered where thoes bits of space shuttle tiles go when they fall off!





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