Seeing double again: more stereo viewers
As I have written before, stereoscopy and stereo-photography are part of a popular niche in photography and collecting. Some people, for example Ron Blum, of South Australia, have collected vast…
3D viewing in the early 20th century. Photo by William Fraser
Seeing double: 3D in vintage stereographs
Humans have two eyes for a good reason. Viewing the same scene from two close but very slightly different locations creates an impression of depth. The brain, processing visual data…