This photographic medium uses a strip of film 35 millimeters wide, containing a sequence of transparent images. These images are projected onto a screen using a slide projector, revealing vibrant, positive color depictions of the captured scenes. A common example would be family vacation photos displayed on a screen during a gathering.
This format offers a distinct viewing experience compared to prints or digital displays, providing a larger-than-life representation with rich color saturation. Its historical significance lies in its popularity during the latter half of the 20th century, serving as the primary format for both amateur and professional photographers for decades. The tangible nature of slides allows for direct handling and organization, contributing to a unique archival quality. The direct projection of light through the film creates a luminous quality often described as possessing greater depth and dynamic range.