On the trip we used a quality street tin with a small hole in, it had photographic paper inside and a little flap on the front, when you place the tin down in the sun you lift the flap up for an amount of time, the sunnier it is the less you hold the flap open. the sun projects the image in front of you onto the photographic paper. we then took it back to the room where the people used chemicals to keep the picture.
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