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08-28-2017, 04:49 PM   #1
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What is this? Inside my 50 1.4-A? Worth repair?

Last edited by Adam; 08-28-2017 at 04:58 PM. Reason: fixed image
08-28-2017, 05:01 PM   #2
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I've fixed the image embed for you. Remember that you need to get a link to the image, rather than the page containing the image, when using IMG tags. Or, you can just paste the link to the page without IMG tags for people to click.

That looks like a spiderweb to me! Can't say I've seen one inside a lens before.

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08-28-2017, 06:05 PM   #3
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Spiderweb or fungus. If it is indeed a spiderweb, it's probably a lot more fixable than fungus.
08-28-2017, 08:27 PM   #4
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it looks like a spider is living there now...

08-28-2017, 09:57 PM   #5
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Does it move with the aperture blades? If it is a web, it looks like it should come apart if you open the aperture.
08-29-2017, 04:16 AM   #6
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Even if it is fungus, all it requires is disassembly of the lens then cleaning the affected element. There are some good in depth YouTube walk-throughs out there.
08-29-2017, 09:24 AM   #7
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Spider/mite silk! Or maybe from a very small caterpillar

This is sort of cool. A few days ago there was a post that looked like a small slug had crawled around the inside of a lens leaving fungus in its wake and today we have silk!

As noted above, a service person can remove this and it is unlikely there is any permanent damage to the lens.

08-29-2017, 09:32 AM   #8
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I've disassembled/reassembled a 50-A f/2 last year, if the I.4 is similar, it would be an relatively easy do-it-yourself.

+1 Insect silk

Last edited by Helios 1984; 08-29-2017 at 09:39 AM.
08-31-2017, 12:30 PM   #9
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QuoteOriginally posted by Helios 1984 Quote
... if the I.4 is similar, it would be an relatively easy do-it-yourself....
Unfortunately this is not the case. The 1.4 is quite different.
08-31-2017, 02:43 PM   #10
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