Stereo Cameras
Stereo, or 3D photography is nothing new. In fact, our understanding of binocular vision only narrowly preceded the invention of photography. With an exciting new means of capturing and preserving moments in time, extending the technology of photography to incorporate three dimensional vision was a natural progression.
The categories listed below do not represent hard start/stop points between eras, particularly as relates to cameras made prior to WWI. The differences between the first two categories are more a question of style, and there is considerable overlap between them. One could argue the World Wars had as much or more impact on camera aesthetics and construction than any specific technological advance. The transition from camera as object of manufacturing skill, to camera as appliance, took something on the order of 30 years. Therefore, while I use turn of the century as an artificial break point, there are several pieces presented outside the era in which they were actually constructed.
