Sigma 18-125 HSM noise when camera is on

Started Jul 22, 2010 | Discussions thread
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Sigma 18-125 HSM noise when camera is on
Jul 22, 2010

just got lens for my T2i. when i put lens on and turned camera on it makes noise that i can hear coming from lens. camera is sitting on desk so its not OS, i turned both OS and AF off and still does it. could it be defective lens?
noise reminds me of electrical flow noise (thats best i can describe it)

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