The document summarizes key changes and discoveries in photography throughout the 18th and 19th centuries. Camera obscura was made portable in the 17th century in France. Prof. J. Schulze discovered the first way to record a permanent image in 1727. In 1839, Louis Dagierre and Joseph Nicecpe introduced the daguerreotype process, allowing for higher quality images on silver-plated copper plates, making photography faster and more accessible. Henry Fox Talbot then introduced the calotype process in 1841 using paper coated with silver iodide, enabling unlimited prints. Further developments like chemical re-touching, larger prints, and the introduction of the first photographic studio system by Adolphe Disder

1. Research on changes to photography in 18th/19th Century<br />And notes from others feedback<br />What was the change?How did it happen?When is the change dated?Who discovered it?What were the benefits of change?Camera obscura was made portable in the form of cenden chairs.By placing the camera on a tripod in a box with wheels that moves.17th Century in FranceLeon Battista AlbertIt was now made portable.Photosensitive compound. (Bunch of chemicals that react with light.He held a bottle to the sunlight, and a reaction would take place.1727Prof. J. SchulzeThe first way of recording a permanent image.Process was introduced called daguerreotype. Recording the images on silver plated copper, for better quality and a clearer image.1839 AugustLouis Dagierre & Joseph NicecpeIt was faster and less expensive, making it more accessible back then.Negative/positive process was introduced called calotype.Process using paper coated with silver iodine, being exposed to sunlight.1841Henry Fox TalbotPrints were easy to examine.Re-touching could be done.Unlimited prints.Large prints/ Photos made bigger.Chemical reactions taking place.1854 in FranceAdolphe DisderiA better image quality, making it much clearer.Photos made with colour.By experimenting with several different filters.1861James Clerk MaxwellYou could now get images with colour.<br />