user-1: I don't know is this is the correct place to ask this but ...
I've watched several "making of" of current movies and noticed a thing i cannot explain. 
What is this strange "secondary" camera you can see near the main camera?
Image: 

Reference:  (5:52 and 6:50)




user2155: That is a specially built enclosure called a Sound Blimp, for a still camera, which renders it completely silent, so they can shoot stills without clicks and beeps disturbing the filming.

-1: <p>I don't know is this is the correct place to ask this but ...</p>

<p>I've watched several "making of" of current movies and noticed a thing i cannot explain. </p>

<p><strong>What is this strange "secondary" camera you can see near the main camera?</strong></p>

<p>Image: 
<img src="https://i.stack.imgur.com/F4I99.png" alt="enter image description here"></p>

<p>Reference:  (5:52 and 6:50)</p>

<p><div class="youtube-embed"><div>
                <iframe width="640px" height="395px" src="https://www.youtube.com/embed/e3-VCVLtlBQ?start=350"></iframe>
            </div></div></p>
 2155: <p>That is a specially built enclosure called a <a href="http://en.wikipedia.org/wiki/Sound_blimp">Sound Blimp</a>, for a still camera, which renders it completely silent, so they can shoot stills without clicks and beeps disturbing the filming.</p>
