Uncleanable dirt in a lens

Started 2 months ago | Discussions thread
OP Pakro New Member • Posts: 9
Re: Uncleanable dirt in a lens

Hello guys,

I bought a Canon 10-22 lens second hand and found out that there was a lot of dirt inside of it so I disassambled the front element to clean it and I made sure that it was done properly using compressed air and accessories special for lens cleaning.

After reviewing the result of the cleaning I noticed there was still dirt that was showing up in pictures so did it again even more thoroughly than the first time putting in extra work cleaining both the front element and the lens behind it to make sure it's crystal clear. Unfortunately the dots are still there partially visibile but only at higher aperture but there is still one that shows up in the spot fully black that never got removed.

Is this some sort of permanent damage or why is it not getting removed? Thanks for insights.

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