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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 17 Feb 2013 (Sunday) 01:27
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24-105 IS Blured when stopped down

 
dochollidayda
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Feb 17, 2013 23:31 |  #16

I think that F5.6 its missing focus. I think more information like, type of focus, what part of frame etc are needed. What happens when a similar test is done at 1/30 sec?


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Sirrith
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Feb 18, 2013 08:18 |  #17

This is indeed a known issue. There have been other posts about it on the internet. I have just done and confirmed this problem with my 24-105 too. I am perfectly capable of consistent results wide open at 1/5s 105mm, but when stopped down, the image becomes blurred, always in the same direction. I will have to send my lens in to Canon.


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Xcelx
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Feb 18, 2013 10:09 |  #18

Had to try it out on my UY 24-105 after reading this. My lens works OK, there is no difference in stabilization between f/4 and f/5.6 at 1/5s




  
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indefinite_pronoun
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Feb 18, 2013 11:00 |  #19

Based on a thread on another forum, this is indeed a real issue affecting some of the more recent 24-105s. One possibility mentioned was electronic interference between the signal to stop down the aperture and the IS. This would explain why everything looks fine at f/4.

A poster by the name of tim73 conducted an informal survey, with the following results:

tim73 wrote:
So far I've collected 29 reports, comprising 12 bad lenses and 17 good lenses. 23 of those reports included serial numbers as follows:

In the range 422xxxx - 430xxxx there were 9 bad lenses and 1 good
Outside this range there were 12 good lenses and 1 bad

It might be interesting to check the serial number of your lens. Mine was 44xxxxx and did not exhibit the problem. In any case, if you are sure that you have this problem a warranty repair is in order.




  
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Roxie2401
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Feb 18, 2013 12:32 as a reply to  @ indefinite_pronoun's post |  #20

Has anyone been able to obtain a specific serial number range from Canon on this issue? Do we know which Canon Service Center (New Jersey, LA, etc.) acknowleged the issue?




  
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Sirrith
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Feb 19, 2013 09:55 |  #21

Mine is 426xxxx, so it fits in the range of affected numbers. I don't think Canon has acknowledged this issue.


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BigLobowski
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Feb 20, 2013 16:10 as a reply to  @ Sirrith's post |  #22

Ugh, just read this, and performed multiple shots, with consistent results. On left is f/4 3200 ISO @1/10. On right is f/5 3200 @ 1/10, both with IS on. Serial # starts with 428xxx. Guess it's time to use one of those CPS shipping cards!
ETA: Lens deate code UA

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Andrushka
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Feb 20, 2013 16:12 |  #23

Stickman wrote in post #15620050 (external link)
Fix what issue? You are using to low of a shutter speed, IS doesn't stand for Independant Sorcery.

hahahahahahaha bw!


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Lichter21c
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Feb 20, 2013 16:26 |  #24

I just tested mine, absolutely no difference. Mine is a UV date code




  
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Xcelx
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Feb 20, 2013 16:29 |  #25

Great thread, helps people identify a potential problem with their lens. I'd never imagined there could be a problem like this.




  
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mike_d
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Feb 20, 2013 16:30 |  #26

I just tested mine at 1/6 sec. f/4 and f/5.6 produce equally crappy shots.




  
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BigLobowski
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Feb 20, 2013 16:46 |  #27

Lichter21c wrote in post #15633066 (external link)
I just tested mine, absolutely no difference. Mine is a UV date code

In another post I read this only aapplies to lenses with the UA date code and the above mentioned range of serial numbers.


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drzenitram
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Feb 20, 2013 17:03 |  #28

Wow. I had a UA code 24-105 and sold it, but I just went back through lightroom, went to filter by metadata, far left column selected lens- 24-105, next column was aperture- 5.6, next column was shutter speed, and every picture was blurry from hand shake(under the 1/fl shutter speed).

Maybe this problem is really widespread.


I would have never even noticed it, though. The 24-105 is practically as sharp at f4 as it is at any other aperture, so I rarely used it above f4 unless I needed more DOF.

Just contacted the guy I sold the lens to, hopefully this is in my head, has anyone had this issue fixed?


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24-105 IS Blured when stopped down
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