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Old Dec 4, 2005, 7:08 AM   #1
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I just bought the 70-300 IS USM. Its a nice lens. One question though, does it make a whirring sound when the IS function is ON?

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Anurag
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Old Dec 4, 2005, 1:44 PM   #2
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all IS lenses make a slight whirring/purring sound..
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Old Dec 4, 2005, 9:23 PM   #3
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Mine does. I beleive it's the motors moving the elements around to keep the image stable.
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Old Dec 7, 2005, 9:08 AM   #4
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You should hear the 500mm F4L. You'll think you left your car motor running!

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