The Challenge: Make a camera and film
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The Pinhole Camera
The simplest camera uses a tiny hole as a lens. Light falling on such a "pinhole"
emerges on the other side and creates an image on a screen some distance
from the hole. For a sharp image, the hole needs to be very small. This
means that only a small amount of light will be let through, so the image
that's formed will be dim. We considered using a pinhole for the "lens"
on the castaway camera, but decided that there wouldn't be enough light.
A simple camera compared with the human eye
The castaway camera