Summicron-SL 35 (non APO) - Rattles inside...

[midn8]

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Hello all,

I guess/hope this question is superfluous... but I ask it anyway... 😁 

When I turn/tilt my Summicron-SL 35 (non APO) in my hand something inside moves and rattles clearly. Even if mounted to the switched off camera.
When the camera is switched on this "thing" seems apparently locked and nothing is loose anymore. Since the lens does not have a stabilizer 
I suspect it is some sort of moving "focus element" and ultimately the described behaviour is just normal or constructional?

I have created a video to illustrate this (increase volume if necessary):

https://drive.google.com/file/d/1zlonKz05fo9iL2s5GB7tSx4IOyyoWWIK/view?usp=sharing

What are your experiences with this lens?

Thanks in advance,
midn8
 

[Mikko Kankainen]

Same noise in my unit, so no worries.

[hellobrandonscott]

Even the APO ones does this ever so slightly. TBH most lenses of most brands I've owned have done this.