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Lenses. 3 camera obscura / pinhole camera 3 Focal length is the distance between the lens and the point where the light rays converge. It controls. - ppt download
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turn your bedroom into a camera obscura and make photographs with it
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Bonfoton turns your room into camera obscura
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Amazing Camera Obscura - Shop
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Simple Bedroom Camera Obscura for Under $5 : 4 Steps (with Pictures) - Instructables
Camera Obscura | Jamie Wróbel
