The Patent Diamond Cameo photograph was registered by F.R. Window of London in 1864. Four small oval portraits (1″ x 3/4“) were placed on a carte de visite in the shape of a diamond, each portrait being of the same person photographed in a different position. A special camera made by Dallmeyer was used in which the one glass negative was moved to a new position in the back of camera after each portrait had been taken, and when the paper print had been pasted on the card a special press was used to punch the four portraits up into a convex cameo shape. |
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