Page 53 - Expanded Photography

Expanded Photography Bob Cotton 53/146
member of Alfred Steiglitz’ Photo-Secession group of Pictorialist photographers - demonstrates their aspirations - to create photographic works on par with the best (and latest) fine-art avant garde. Another singular advantage of the Autochrome was that it was a reversal process, produ- cing a positive image on glass and film.https://www.nytimes.com/2007/05/21/arts/design/21stei.html
Autochrome as slide/transparency
This meant that the Autochrome had to be viewed not as a print but as a slide - the transmitted (projected) image was therefor especially bright and clear. Many early Autochromes were produced using stereo cameras, and the stereo slide enhanced the depth and three-dimensionality of the
colour image.
https://psap.library.illinois.edu/collection-id-guide/slide