100-400L cleaning with a vacumcleaner

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vlab
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100-400L cleaning with a vacumcleaner
4 months ago

Hi all,

In the recent trip to Costa Rica I dropped my 100-400L in the sand when was changing lenses. Cleaned with a brash, blow with air and was c continue shooting. When I came back home, I noticed quiet noticeable dust inside at 100 range, just looking through the lens in bright light.

Tried vacuum cleaner from mounting side, but much luck.

Some time ago I read on this forum that some people had success and do this often.

May be I'm doing something wrong, what is exact procedure?

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