1) Photography emerged through centuries of experimentation and gradual discoveries, with the basic chemistry established by the late 18th century.
2) The first permanent camera images were produced in the 1820s by Joseph Niepce, with Louis Daguerre later developing the daguerreotype process.
3) William Henry Fox Talbot invented the calotype process in the 1830s, enabling negatives and multiple prints. Frederick Scott Archer introduced the wet-plate collodion process in the 1850s.