Don't worry if you don't see the lens protrude from the phone while zooming, because unlike on a regular camera, all of
the moving glass elements remain neatly inside the Zoom's disc - shaped camera module.
Not exact matches
Instead, Disney created multi-layered backgrounds with several
glass panels that could be manipulated individually to create the illusion of parallax as a camera panned across the scene:
glass panels with foreground features
moved faster, while the panels with the farthest
elements of the background
moved slowly.
A camera is a system of
glass and mirror that
moves light through space, by using a lens comprised of
glass elements, a reflex mirror, a pentaprism, and finally an eyepiece.
Since iOS 7, Apple has slowly
moved the
elements in iOS from ethereal, translucent panes of
glass back to something that feels much more tactile (though not, of course, skeuomorphic), and it's better for it.