Camera Obscura

	Camera Obscura camera - room and obscura - dark first mentioned in 5th century A. D.
	Stephen Berkman, contemporary photographer, was able to recreate the shroud by using renaissance techniques with materials that were available to Leonardo Da Vinci. He used common salt and silver nitrate and applied the light sensitive emulsion to the same type of cloth used for the shroud, a 3:1 herringbone twill and waited for light to bestow an image onto the piece of linen 14 feet long and 3 1/2 feet wide. For 43 days he focused his camera obscura on a manikin, and showed it was possible to produce a photographic image in Leonardo's time. In the weak light of an amber bulb, Burkman saw that his camera obscura produced an image of the manikin rendered in delicate tones. In 1276 Roger Bacon used lenses. Simple Law of Physics - Light travels in a straight line. When light rays pass through a small opening in a thin opaque material, the rays do not scatter but cross instead reforming the image upside down on a flat surface parallel to the hole. Photography was invented in 1826. Berkman's success lends credence to the notion that Leonardo created the shroud image by taking the first photograph 300 years before the birth of photography. Controversy
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