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“Manufactured in 1961, Kodak’s first carousel slide projector, the Model 550, added a rotary tray fitting onto a standard 35mm slide projector. This allowed for motorised ‘slideshows’, images that could pass in sequence without user input, slide-cycles that snap together producing something resembling a film – if a very slow one. While not a new invention, Kodak’s product offered a number of advantages over competitors’ – not least affordability and reliability – and it quickly became a feature in galleries, performances, archives and lecture halls, as well as in the home.”