Question About 70-200mm f4L IS

Started Jan 5, 2012 | Discussions thread
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Peter Kwok
Peter Kwok Senior Member • Posts: 2,301
It is the gyro

I think the 70-200 f4 IS is the last Canon lens with mechanical rotating gyros to sense movement. The gyros are on continuously. Newer IS use non-moving piezoelectric sensors. Only the motors that move the glass elements make sound.
Peter Kwok
WYSIWYG - If you don't like what you get, try to see differently.

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Canon EOS M Canon EOS 5DS Canon EF 70-200mm f/4L IS USM Canon EF 16-35mm f/4L IS USM Tamron SP 45mm F1.8 Di VC USD +3 more
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