HELP! What is this on my lens?

Started Nov 22, 2012 | Discussions thread
Ichinichi
Regular MemberPosts: 133
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Re: HELP! What is this on my lens?
In reply to JohnK, Nov 22, 2012

Now there's a dedicated DPR member! Helping out on Thanksgiving!

Thanks JohnK!

I guess I have two questions:

This surface is on the diaphragm side, but it separated from the blades by another element. How did oil ever get onto it? Anyone have success with it for something like this?

Any other possibilities?

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