This document outlines the history of photojournalism through key technological milestones in photography from 1837 to 1979. It describes the invention and impact of early photographic processes like daguerreotype and wet-plate collodion, as well as innovations like roll film, 35mm cameras, color film, and Polaroid cameras that made photography simpler and more accessible. The introduction of digital cameras in the 1970s marked a transition to digital imaging that reduced costs and allowed for instant image review.