Phone-O-Scope: Step 2
The slightly odd Phone-O-Scope, which is an adapter to affix SLR lenses to iPhones.
Build instructions and more details are here.
You'll need to take laser pickup (see left inset, above) out of the CD player and start to pull it to bits. I was able to get three lenses out; you'll need to verify that each one is a magnifier. These can be stacked to achieve more magnification of the lens aperture (when it is attached); the more you can magnify, the less vignetted the image will be.
I wrapped a thin layer of putty around the edges of the stacked lenses to stick thin strips of paper around the edges of the lenses. This is so that they can be assembled together and handled as a single unit.