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03-28-2008, 09:03 AM   #1
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how is your Sigma 10-20 focus ring?

finaly got this in the mail the other day

havent run it through my battery of tests yet, but i noticed that the focusing ring, compared to both a Canon and a Nikon model (that i have used and operated), it produces a noticeable audible noise when turning, almost like its grinding through sand

however it FEELS smooth and there is no noticeable resistance to this.



how are YOUR copies? does the focusing ring make noise?

if my IQ tests come back positive, should i worry about this?

03-28-2008, 09:12 AM   #2
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You DID put the body into manual focus, right? I had the Sigma 10-20mm for Pentax, and now own it for Canon. I don't remember any noise with my Pentax (in manual focus), but it did have some resistance, which was nice. If I recall correctly, it felt very similar to my HSM 10-20mm for Canon (which CAN be turned while in autofocus)
03-28-2008, 09:22 AM   #3
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my camera is always in MF

hmm, the sound (now that i did it again) is almost like just a mechanical whine, like two unoiled gears...
03-28-2008, 10:24 AM   #4
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Just spun mine and it's extremely smooth with just a hint of gear works. Compared to my 17-70, it is about equal in sound and feel. Nothing out of the ordinary. It is barely audible from 3 feet.

03-28-2008, 10:57 AM   #5
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Mine has a slight noise, but no grinding
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