Kodachrome is the brand name for a color reversal film introduced by Eastman Kodak in 1935. It was one of the first successful color materials and was used for both cinematography and still photography. For many years, Kodachrome was widely used for professional color photography, especially for images intended for publication in print media.
Kodachrome
Kodachrome K135 20 Color Reversal Film
Kodachrome II – Film for color slides
Ciné-Kodak Kodachrome 8mm movie film (expired: May 1946)
In photography, reversal film or slide film is a type of photographic film that produces a positive image on a transparent base. Instead of negatives and prints, reversal film is processed to produce transparencies or diapositives. Reversal film is produced in various sizes, from 35 mm to roll film to 8×10 inch sheet film.
A single slide, showing a color transparency in a plastic frame
Slide projector, showing the lens and a typical double slide carrier
Film scanner
Slide projector Leitz Prado