Answer:
Like the best things in life, the camera obscura is very simple. Light enters through a hole in the top of the camera and is focused on a screen on the bottom. But unlike a modern camera, the camera obscura does not create an image you can take away. You see the image by being inside the camera itself.
Step-by-step explanation:
The camera lucida is an optical device which merges an image of a scene and the artist's hand on paper for tracing. By contrast, the camera obscura is an optical device that projects a realtime image through a small pinhole (or lens) into a darkened room.