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Dust inside lens

Started Oct 11, 2021 | Discussions thread
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orbmansony
orbmansony Contributing Member • Posts: 741
Dust inside lens
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I bought my Canon 100-400mm Mark II lens in December 2016. When it first arrived, I noticed one dust particle behind the outer lens element (inside the lens). As it did not affect any of my photos, I didn't bother to return the lens.

I just noticed that there are now a lot of dust particles behind the outer lens, but they don't seem to be affecting any of my shots (see attached photo of the lens).

I have two questions. The first is if there is any way to clean out these dust particles without having to send the lens back to Canon for a repair. The other question is how are the dust particles getting into the lens?

Thanks,

Orb . . .

 orbmansony's gear list:orbmansony's gear list
Canon EOS 50D Canon EOS 7D Canon EOS 7D Mark II Canon EF 50mm F1.4 USM Canon EF 200mm f/2.8L II USM +4 more
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