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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 14 Sep 2014 (Sunday) 12:23
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IS unit in 70-200 2.8 mkI + heat

 
tedyun
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Sep 14, 2014 12:23 |  #1

Hi all,

I was wondering if anyone had this experience, and if you would recommend sending the lens in.

I am using a 70-200 f2.8L mk I

We've been going through a heat wave here in San Diego. I was outside photographing my son's soccer game right smack during the peak heat/sun. Suddenly, when I pushed the AF button on my camera, the lens started to make an audible hum. It is similar to when I am focusing in AI Servo with the IS turned on, but louder.

I think this is the IS unit because when I turned the switch off, it no longer made a sound.

AF was fine with the IS on (and humming) or off.

The lens was definitely warm from being in the sun (as was I!!!). I continued to shoot with the IS turned off.

When I got in the car, I had the air-conditioning full blast. When I checked the lens again after it reached ambient temp, it was fine. No hum.

Currently it is fine, but I'm not going to try to replicate the problem by going out into the sun.

Does this sound familiar to anyone? Should I bother sending it in? I'm afraid that they won't be able to replicate the problem, and I kind of need the lens over the next few months (soccer season).

Thanks in advance for any insight and advice

Ted




  
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jimewall
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Sep 14, 2014 13:36 |  #2

I've never had (or at least never noticed) that problem before. Others may chime in, hopefully it is nothing.

It is a discontinued lens, and at some point Canon stops servicing discontinued lenses. I'm not sure if they are still servicing this lens still or not. You will want to check on that. (If needed) You may need to find a lens repair place other than Canon.


Thanks for Reading & Good Luck - Jim
GEAR

  
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zarray
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Sep 14, 2014 20:26 as a reply to  @ jimewall's post |  #3

my 70-200 IS mk1 always made a hum whenever the IS was engaged :rolleyes:


5D Mark II | 5Dc |17-40 | 24-105 | 70-200 F2.8 IS | Sigma 50mm 1.4 | 580EX

  
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bobbyz
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Sep 14, 2014 21:18 |  #4

I bet canon L glass is used in lot more high temp places than san diego.


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tedyun
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Sep 14, 2014 21:54 |  #5

zarray wrote in post #17154470 (external link)
my 70-200 IS mk1 always made a hum whenever the IS was engaged :rolleyes:

Yes, I'm aware of that. The sound I'm describing sounds like the normal IS hum, but amplify it 10x. For example, I can hear the normal IS hum in a quiet room but not at, for example, a kids soccer game where kids, parents and coaches are constantly screaming at the top of their lungs. The sound I'm talking about was audible in that crowd.

Well thanks for the input all. I think after the soccer season is over, I'll have it checked out. For now, I'll hope by the next few weeks, this heat wave will subside and I won't have further problems.




  
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Reservoir ­ Dog
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Sep 14, 2014 23:14 |  #6

It might be a dilatation effect (not sure), but cold from your car with air conditioning (because i suppose you go to the soccer game with air conditioning in your car), and suddenly under the sun might dilate some part more quickly than others.
Next time try to put your lens in the back trunk of your car during the travel (place without air conditioning or less cold) and see if it do it again ;)


Patrice
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IS unit in 70-200 2.8 mkI + heat
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