Air felt when zooming?

Started Jun 16, 2010 | Discussions thread
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kinetic758
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Air felt when zooming?
Jun 16, 2010

Just noticed that whenever I spin the zoom ring on my nikkor 17-55, you can actually feel a little bit of air blowing out the back of the lens (obviously the lens was detached when I experienced this).

Is this normal operation? If so, has anyone noticed increased dust problems?

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