
I will go first, a stealth tank - sh.itjust.works
r*ddit
[https://old.reddit.com/r/NonCredibleDefense/comments/1btb8l1/i_will_go_first_a_stealth_tank/]
A rifle scope that can see through walls.
It has a negative magnification: it’s a fisheye lens.
Fisheye lens is fractional magnification, negative magnification is mirror