What are Slides and Transparancies?

Overview:
Non-digital photographs are produced with a 2 step chemical process. In this process, the light-sensitive film captures a negative image. This means that the colors and lights/darks are inverted.

To produce a positive image, the negative is most commonly transferred onto photographic paper. It may be of interest to the reader that printing the negative onto transparent film stock is used to manufacture motion pictures.

Slides:
As an alternative, the film can be processed to invert the negative image, yielding positive transparencies. Such positive images are usually mounted in frames which are called slides. Before digital photography, transparencies were widely used by professionals because of their sharpness and accuracy of colour rendition. Most photos published in magazines were taken on color transparency film.

Originally, all photos were mono or hand-painted in colour. Although methods for developing colour photos were available as early as the1861s, they did not become widely available until the 40s or 50s. In fact, until the 1960s most photographs were taken in black and white.

Slide Scanning Prices and Options