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08-05-2010, 06:48 PM   #1
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Something in my 50MM 1.7 M

Purchased a 50mm M 1.7 that looks like it's in really good condition but I noticed what might be a piece of dirt or maybe a very small insect in the lens. Whatever it is seems to be stuck to the sides of the inner barrel just behind the aperture blades. I only see it when wide open. It's brownish colored strand of whatever.
I took a few shots @ wide open and didn't notice any negative effect .
I'd still like to get that piece of crud out of the lens. I'd expect that this crud will decompose and break apart and eventually cause problems.
Should I attempt to clean out or leave good enough alone?
Anyone have tear down procedures for this lens?


Last edited by seachunk2; 08-05-2010 at 07:19 PM.
08-05-2010, 07:19 PM   #2
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I would vote for leaving it until/unless it becomes a problem
08-05-2010, 07:28 PM   #3
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Post some pictures of it? It's most likely not going to cause a problem with IQ, only resale value. So I'd say leave it be.
08-05-2010, 08:57 PM   #4
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Go out and take some pictures.

08-05-2010, 09:03 PM   #5
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Definitely leave it be. If you try to clean it you can damage or make the situation worse. If it does not show up in your pics, leave it alone for sure.
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