Anastigmat Fedar Enlarging Lens 3.5" 90mm F6.3 on mounting plate
Screw the ring off of the bottom by turning it counter clockwise. You'll find a small glass lens, take it out, and leave it to the side
* Don't use generic super glue, it doesn't hold. Get locktight or something along those lines.
DO NOT DO THESE STEPS WITH YOUR PHONE IN THE OTTERBOX. REMOVE YOUR PHONE BEFORE GLUEING