Definition: 35mm slides are transparencies containing 24mm x 36mm images inside 2x2-inch mounts. 35mm slides are the standard type of slide for the photography industry, and they can be displayed in a slide projector.
35mm slides were far more popular during the era of film photography. With the advent of digital photography and computers, 35mm slides now are only created for special occasions. Many people convert their 35mm slides to digital images using a digital slide scanner.
