And if you assemble several pictures, and present them sequentially, you have a slide show. Photographic slides are a convenient, portable, effective image medium. Projected slides provide sharp, bright images suitable for viewing by large or small audiences. And, slides can be either visual support alone for talks or lectures, or accompanied by a complete sound track, essentially making a stand-alone presentation possible. A slide, used conventionally, is useless without projection equipment, which is not always portable, or convenient.
Slides are a delicate format, easy to scratch and bend.
And, slides are not easy to duplicate in quantity. Cameras that record digital images are becoming accessible and affordable. Digital photographs can be downloaded directly to your computer and seen immediately, a tremendous advantage. Unlike photographic slides, which must be scanned into computer formats, digital camera images are ready for use on the computer immediately. Unfortunately, there are disadvantages to this new technology.