Sigma 30mm Aperture and focus noise

Started Apr 5, 2012 | Discussions thread
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Tom Cody
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Sigma 30mm Aperture and focus noise
Apr 5, 2012

Stopped by B&H today and picked up the Sigma 30mm 2.8. For others that have this lens, a few questions.

Aperture: When changing the aperture, is it very loud?

If I have it the camera in "A" mode and dial through the aperture settings from F2.8-22, the clicking sound is very loud. Much much louder than the kit lens. When auto-focusing, the lens clicks clicks clicks when opening the aperture to focus and closing. The big problem is you can hear these load clicks on the video.

Focus motor: Can you hear a grinding noise when focusing?

Not as loud as the aperture clicking, but a constant grinding sound can be heard when finding focus. The big problem is you can hear it on video.

Just taking a poll if this is normal or a bad copy of the lens.

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