이제 이걸 회전시키면 원기둥을 물리적인 원리를 이용해서 -- 렌즈 안에 프로그램화가 되어있는걸 볼 수 있습니다.
And as I rotate it against this side shot, you'll see that that has cylinder, and that was programmed in -- literally into the physics of the system.