Brown, Theodore Busch, Emil Cadwell revolving stereoscope Calotype Camerascope Capsa Carette, Georges Carl Zeiss Jena Carte-de-visite Cartoscope Casket Caténoscope Chadwick’s Lenticular Stereoscope Chain-based stereoscope Chambre Mobile Chappuis patent Chappuis, Paul Émile Charles Mendel Stéréoscope Chromatic aberration Chromoplast Clairvoyant Claudet patent curved sides Claudet viewing case Claudet, Antoine Clégil Stéréoscope Clément & Gilmer Clément & Gilmer patent Clément, Paul Closed system Clouzard & Soulier Coin-operated stereoscope Collodion positive Colour fringing Colouring