Camera Lucida Saving And Restoring Sessions Roland Barthes and Camera Lucida 投影描繪器

 https://youtu.be/KdnrQKo1-xQ

https://en.wikipedia.org/wiki/Camera_lucida

https://zh.wikipedia.org/wiki/%E6%8A%95%E5%BD%B1%E6%8F%8F%E7%BB%98%E5%99%A8