What are these marks on the inside of the lens barrel?

[grimp0teuthis]

I have the option to buy a lens I've been wanting to try out. It has marks on the inside barrel like the ones in this picture -- do they indicate damage of some kind?

Also the seller will do a full CLA before sending.

Thanks!

 

[TheFlyingCamera]

That's "Schneideritis". It's a common phenomenon. It's harmless.

 

[grimp0teuthis]

Thanks!

 

[E. von Hoegh]

That's "Schneideritis". It's a common phenomenon. It's harmless.

To clarify, it's the black paint on the edges of the glass elements lifting off. The one possible danger, and it's a small possibility, is that this can expose the cement used to bond the elements together and eventually lead to separation, in a few decades.

 

[AgX]

I see such reflections at painted lens surfaces quite often. Sometimes I wondered if they had not been there from the start.caused by entrapped airbubbles at rough grindings.

 

[Alan Gales]

I have a Fujinon lens with this. It does lower the value of the lens slightly. Great for the Buyer, bad for the Seller. Of course optical quality is still the same.

 

[paul ron]

yup that's the edge blackening lifting off. They black the edges to reduce flare.
If you wear glasses you'll understand how it helps.



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