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05-25-2010, 06:05 PM   #1
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18-250mm pentax

I just found dust inside my 18-250 lens. I read that zooming lenses like this with a long extension can cause a bellows effect pumping dust into the the housing. Can anyone corroborate this. Lito

05-25-2010, 06:08 PM   #2
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There's probably dust inside most lenses. Doesn't affect image quality unless there's a ton of it.
05-25-2010, 07:00 PM   #3
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The 18-250 is a dust magnet. I wouldn't be too worried about it. Mine had plenty and I never noticed it in my images.
05-25-2010, 07:03 PM   #4
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As the others said, it shouldn't affect IQ and is quite normal as long as the specs are few and relatively far between

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