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Occasional Contributor
Posts: 5
Registered: ‎01-01-2014

Constant Noise from 24-70 F4 L (even when NOT focusing)

Hello-

 

I turned my camera on this morning and there is a constant 'gear' type noise occuring with my 24-70 F4 L.  It is occuring on both my bodies; 5D iii and 70D. Here are some supporting details. These pertain to both bodies as I tried on both.

 

1) Even with the Camera off, the noise happens once when I attach the lens. With the camera off, it just happens once, briefly,  when I put on the lens.

 

2) When I turn the camera on the noise starts and does not stop.  It is quite audible.  Much more than any "normal" lens noise.  It starts right away and does not stop.  Only turning off the camera will stop it.

 

3) I tried turning both IS and AF on and off, did not make a difference

 

4) I was able to take shots and the AF seems to be working properly.

 

Any thoughts?

 

Thanks so much in advance for your insight.

 

Regards

Honored Contributor
Posts: 5,436
Registered: ‎08-13-2015

Re: Constant Noise from 24-70 F4 L (even when NOT focusing)

Good info.  Which body are you using in the your four cases?

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"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
Occasional Contributor
Posts: 5
Registered: ‎01-01-2014

Re: Constant Noise from 24-70 F4 L (even when NOT focusing)

Hi Waddizzle-

Thanks for responding.  The same scenarios with both bodies (5D iii and 70D).  It was the first thing I tried to isolate whether it was the lens or the body.  

Esteemed Contributor
Posts: 3,728
Registered: ‎06-25-2014

Re: Constant Noise from 24-70 F4 L (even when NOT focusing)

I guess maybe I'd suspect a short circuit in the IS mechanism. Almost the only other possibility left would be some kind of malfunction in the mechanism that keeps the diaphragm open to full aperture. In any case, it doesn't sound amenable to a DIY fix.

Bob
Boston, Massachusetts USA
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Posts: 8,118
Registered: ‎12-07-2012

Re: Constant Noise from 24-70 F4 L (even when NOT focusing)

Strange noises from an IS lens is almost always the IS.  It is not a DIY so call Canon service tomorrow.

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