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Author Topic: 24-70 f/2.8L 'wobble'  (Read 4749 times)

pcox

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24-70 f/2.8L 'wobble'
« on: January 16, 2006, 06:16:13 AM »

Hi folks -
Yesterday I was out shooting with the 24-70 and while wiping rain off the front element I noticed that there was some give to the lens barrel. I don't remember noticing this before, and I use the lens pretty hard so I wanted to check if anyone else has seen this before I drop the thing in to get serviced. It still works fine, focus and zoom are OK, no aberrations I can see.

The wobble is a slight side-to-side movement when the lens is at 24mm, with the barrel fully extended. You can rock the extended part maybe a millimeter or two in either direction along a single axis.

Anyone seen this?

Cheers,
Peter
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Kenneth Sky

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24-70 f/2.8L 'wobble'
« Reply #1 on: January 16, 2006, 08:16:31 AM »

I've developed a similar problem on my Minolta 24-85 , but it's 15 years old. As far as I can tell, there is no distortion in the pictures. I still use it as my primary lens on a 7D and it functions as well as it did through 4 generations of film bodies.
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Sune Wendelboe

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24-70 f/2.8L 'wobble'
« Reply #2 on: January 16, 2006, 02:49:59 PM »

I've got a 24-70m and like it. It wobbles slightly, but not so much that ever post a thread about it. Rather the annoying zoomcreep which renders it useless on certain long exposures from a tripod.

I've brought some of my lenses to Canon for adjustment of mechanical parts. You might want to do that. I know your problem so well: I'm I obsessing or are my totally expensive lenses crap? And who can you ask - nobody.


Sincerely
Sune Wendelboe

www.globalphotographic.net
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Eric Myrvaagnes

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24-70 f/2.8L 'wobble'
« Reply #3 on: January 16, 2006, 08:40:35 PM »

Quote
I've got a 24-70m and like it. It wobbles slightly, but not so much that ever post a thread about it. Rather the annoying zoomcreep which renders it useless on certain long exposures from a tripod.

I've brought some of my lenses to Canon for adjustment of mechanical parts. You might want to do that. I know your problem so well: I'm I obsessing or are my totally expensive lenses crap? And who can you ask - nobody.
Sincerely
Sune Wendelboe

www.globalphotographic.net
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My cheapie 28-105 F/4-5.6 Canon zoom wobbles a lot. The outer part can move a couple of millimeters side to side with a gentle finger push, but it seems to spring back ok. I would certainly have to be careful not to bump it during a long exposure, but otherwise it takes surprisingly sharp pictures (for its price point). My L lenses do not wobble, and I would be quite annoyed if they did. I'd ask Canon to check it out.

Eric
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rsamco

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24-70 f/2.8L 'wobble'
« Reply #4 on: January 17, 2006, 12:34:06 AM »

I had noticed the same type of looseness in my 28-70/2.8L after many years of use.  It didn't seem to affect anything so I ignored it.  But I recently used this lens in a dust storm and it picked up LOTS of internal dust.  So a few weeks ago I sent it to Canon for cleaning and they themselves noted (without prompting) that the "front barrel is loose".  Anyway received the lens back in A-1 condition -- the lens was only out of my hands a week and a half, but did cost $158 labor + $15 return shipping.

- Rick
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pchaplo

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24-70 f/2.8L 'wobble'
« Reply #5 on: January 21, 2006, 12:47:02 AM »

Is the 28-70mm L not a sealed lens? Is the 24-70mm L ? I shoot in dust storms, too
Paul

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But I recently used this lens in a dust storm and it picked up LOTS of internal dust.
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rsamco

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24-70 f/2.8L 'wobble'
« Reply #6 on: January 24, 2006, 06:32:21 AM »

Unlike the 24-79, the 28-70 was NOT sealed.
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