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Canon 55-250 IS STM rattling sound when zooming in video mode

Started Mar 8, 2018 | Questions
User514 New Member • Posts: 1
Canon 55-250 IS STM rattling sound when zooming in video mode

Hi,

I just bought a new Canon 55-250mm IS STM lens and everything is working fine except that when I am in video mode and I am zooming, the lens makes a rattling/clicling/motor-like noise that is picked up by the on-board mic when shooting a video in a quiet environment.
The weird thing is that this noise is not there in picture mode when zooming, only when shooting a video and zooming together.
It is NOT the IS or AF noise since I also hear this one (but it is really subtle) and when I turn IS and AF of, the rattling zooming sound is still there..

I am really bothered since I love the lense, but ot is also supposed to be STM (near silent).
I also have a 18-55mm IS STM and there is no sound at all when I do the same thing. It is almost silent (except the extra small IS and AF sound). There is not the rattling sound as in my 55-250.

Is it normal for the 55-250 (anybody also noticed it) or should I return it ?

Here's a video link so you can hear it:

https://www.youtube.com/watch?v=ssx8V8UY61U

I received mixed answers. Some people say I should return it, others are saying it is normal.
Possible explanations are:
Normal mechanical noise of the internals;
Loose motor screw which vibrate when zooming; 
Audio auto gain control, which amplifies the sound picked up when recording;

Does someone noticed the same noise on theirs ?

Thanks a lot !!

ANSWER:
This question has not been answered yet.
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