English Dictionary

scioptic ball

noun

The lens of a camera obscura mounted in a ball that fits a socket in a window shutter so as to be easily turned, like the eye, to different parts of the landscape.

I found a scioptic ball in the attic.

意味（1）

The lens of a camera obscura mounted in a ball that fits a socket in a window shutter so as to be easily turned, like the eye, to different parts of the landscape.