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Thread started 10 Oct 2012 (Wednesday) 15:35
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T4i focus noise with Rode mic

 
tharmsen
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Oct 10, 2012 15:35 |  #1

Hey everyone,

I'm struggling to figure out why I can hear focus motor noise on my T4i with a new Rode VideoMic installed. The Rode is working as the audio is outstandingly clear however despite the Rode being isolated on its mount I can hear every time the camera adjusts focus in the audio track.

I've not been able to find a way to disable the internal mic. I was thinking it was somehow using both mics which was why I could still hear focus motor noise (STM lens too).

Any thoughts?




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John ­ Sims
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Oct 10, 2012 18:41 |  #2

Does the noise appear in both left and right channels? If the camera is using both internal and external mic I would expect them to be on different channels.


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Gantoris
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Oct 10, 2012 21:26 |  #3

Easy fix: Use manual focus! Hahaha.

The internal mic may not actually be on. Which STM are you using? The 40mm pancake is not exactly silent. In fact it is louder than USM lenses.




  
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tharmsen
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Oct 11, 2012 08:45 |  #4

It's the 40mm pancake. It's nice to know all STM's aren't created equal. I guess I'll send it back. Does the 18-135 focus better than than 40mm? I still find that the T4i hunts a lot trying to focus on a relatively static subject in good light and mostly just a face.




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Gantoris
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Oct 15, 2012 23:52 |  #5

Yes, the 18-135 is supposed to be MUCH quieter than the 40mm. It is nearly silent. You will still have the focus issue though because the T4i's full time AF isn't as advertised...




  
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J_O_S_H_U_A
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Oct 16, 2012 12:24 |  #6

I second the advice of going to manual focus. As a videographer for nearly a decade now, I have never found autofocus to be useful when manually focusing is possible.


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ben_r_
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Oct 16, 2012 17:39 |  #7

Manual focus. Get a follow focus.


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StaticMedia
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Oct 18, 2012 09:28 |  #8

I agree with everyone else about manual focus. Learn the lens really well and it will become easier to follow focus manually. I know with magic lantern you can disable canon's internal mic and amplifier, providing line-in only audio however you might need a pre-amp and unfortunately I dont think they have made a version of ML for the t4i yet.




  
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T4i focus noise with Rode mic
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