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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 14 Mar 2013 (Thursday) 15:49
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Curious 100L situation

 
IanE
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Mar 14, 2013 15:49 |  #1

I'm a clumsy oaf. I dropped my 5Dii with 100L attached. The lens started making a repeated buzzing when attached to the 5D and my 7D. Other lenses don't buzz on either camera.

It's been back to Canon twice now, and both times they've said they can't replicate the fault, so can't repair it.

When it comes back this time I'm going to try mounting it on further cameras, but can anyone on this forum suggest anything that could be causing it to buzz for me and not Canon?


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Motor ­ On
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Mar 14, 2013 15:51 |  #2

Could it be you're just noticing the IS working 9because post fall you're listening for fault a little more carefully), but Canon felt the noise level was still normal?


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IanE
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Mar 14, 2013 15:53 |  #3

It's always been a slightly noisy lens, but now it's three short loud buzzes, then a pause, then three more and on and on like that. It's not normal IS or focus noise.


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woodzy
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Mar 14, 2013 16:17 as a reply to  @ IanE's post |  #4

I vote for the normal IS noise - the first time I used it I really noticed it but now I really don't pay any attention.


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weeatmice
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Mar 14, 2013 16:31 |  #5

Record the sound, upload and share and other owners will verify if its making the right noises or not. Does the IS still work despite the noise? And does the noise go away when you switch off the IS?

I dropped mine also, if that makes you feel better. It went to Canon due to a MF clutch problem, the USM was replaced but they didnt say anything about the IS so I assume it was undamaged.


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IanE
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Mar 16, 2013 05:39 |  #6

I took a video of the buzzing and, amazingly, while I was taking the video, it stopped. Hasn't done it since, on either camera.

Here's the video so you can see I'm not crazy:

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john_galt
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Mar 16, 2013 08:06 |  #7

def not normal is sound


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DelAllenGreenwood
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Mar 16, 2013 08:15 as a reply to  @ john_galt's post |  #8

Mine doesn't sound like that.
Hopefully the noise won't come back...


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Sir_Loin
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Mar 16, 2013 10:59 |  #9

That isn't normal operational noise Ian. That sounds like a damaged IS unit, albeit it doesn't make that noise every time. I suggest you send it back to Canon and tell them to disassemble the lens and look for damage and not try to 'replicate' the issue as its intermittent and sods law says it won't happen when Canon have it for testing. Good luck!


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Curious 100L situation
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