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03-31-2010, 05:55 PM
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#1 | | All Day, Err Day Mod
Join Date: May 2006 Location: Vancouver
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| Anybody else's Canon EFS 17-55mm f/2.8 lens focus ring loose?
My friend just lent me his 17-55mm for the upcoming weekend, but while testing the 17-55mm on a couple subjects today on my 7d, I realized that the focus ring wasn't acting like the other lenses i've owned. Even if the switch is turned to AF, the ring would still freely move, but shouldn't it be stiff and lock in place? Also, the motor makes a little humming noise for approximately ~5 seconds after focusing.
I just want to know if anybody else's 17-55mm is acting like this.
N
__________________ Feedback of 40-0-0 -kT: "No man get a ruler and look, 12cm is long!" | 
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03-31-2010, 06:54 PM
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#2 | | Rs has made me the man i am today!
Join Date: May 2008 Location: Burnaby
Posts: 3,148
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maybe it's the FTM focusing? Do you have any Ring-Type USM lenses? They always allow the focus ring to move even in AF.
Now for the humming.. that's odd since USM is supposed to be quiet  | |
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03-31-2010, 10:31 PM
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#3 | | Snapping away
Join Date: Oct 2005 Location: Richmond
Posts: 1,920
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ya the focus ring is supposed to be free to rotate even in AF
maybe it's not the usm motor, but the IS that's making the sound
does ur friend's zoom creep?
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03-31-2010, 10:42 PM
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#4 | | All Day, Err Day Mod
Join Date: May 2006 Location: Vancouver
Posts: 3,999
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Yeah, it does zoom creep 
and i realized that motorized sound was in fact the IS. I just turned it off.
But otherwise, thanks for answering my questions, Dragonone!
__________________ Feedback of 40-0-0 -kT: "No man get a ruler and look, 12cm is long!"
Last edited by Nintensity; 03-31-2010 at 10:48 PM.
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04-01-2010, 12:04 AM
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#5 | | resident Oil Guru
Join Date: Mar 2005 Location: Vancouver
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How you like the lens so far? Such a pricey one!
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04-02-2010, 09:55 PM
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#6 | | I Will not Admit my Addiction to RS
Join Date: May 2004 Location: Vancouver
Posts: 566
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i have this lens. got it for $550 on craigslist. best lens i have! sharp as a samurai's sword!
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04-02-2010, 11:18 PM
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#7 | | Snapping away
Join Date: Oct 2005 Location: Richmond
Posts: 1,920
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that's quite a steal that you got it for, i got mine for 950 on CL
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04-14-2010, 12:17 AM
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#8 | | All Day, Err Day Mod
Join Date: May 2006 Location: Vancouver
Posts: 3,999
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I also realized that I have lens creep... Is anybody else's lens doing the same?
__________________ Feedback of 40-0-0 -kT: "No man get a ruler and look, 12cm is long!" | |
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04-14-2010, 11:59 AM
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#9 | | Snapping away
Join Date: Oct 2005 Location: Richmond
Posts: 1,920
Thanked 97 Times in 84 Posts
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but apparently it comes back even after canon services it. there's a diy fix using black rubber bands. it was originally for the 28-135. also a more invasive one that involves screws that i wouldn't dare try.
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