The Challenge: Make a camera and film
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The Castaway Camera
The castaway camera consists of a wooden box (approx 45 x 30 x 30cm, or
18 x 12 x 12 in.), with one of its
four large faces missing. The box, which should have a 1cm (3/8 in.) hole drilled
in its top face, contains a moveable screen, underneath which sits a mirror.
A second mirror is mounted on top of the box. Both mirrors should be inclined
at 45 degrees.
Light from the object to be photographed is reflected by the upper mirror down through
a lens placed over the hole in the top. The lens concentrates the light
onto the screen, where it forms an image. It helps if the upper mirror can
be rotated, so that light from different objects can be directed into the
box a bit like a periscope.