And there was a lens for this kind of effect, it allowed capturing three images at once [1] [2].
There were also dedicated cameras [3].
> Using its four lenses, four images from slightly different viewing angles were taken simultaneously. With the individual images half the size of the usual 35mm image frames, each 3D photograph taken used the space of 2 full 35mm exposures on the film. So a roll labeled as "36 exposures" would yield 18 3D pictures with four images each.
And there was a lens for this kind of effect, it allowed capturing three images at once [1] [2].
There were also dedicated cameras [3].
> Using its four lenses, four images from slightly different viewing angles were taken simultaneously. With the individual images half the size of the usual 35mm image frames, each 3D photograph taken used the space of 2 full 35mm exposures on the film. So a roll labeled as "36 exposures" would yield 18 3D pictures with four images each.
[1]: https://www.dpreview.com/news/1238704821/this-3d-printed-len...
[2]: https://www.georgemoua.com/store/d9000-fe-3d-stereoscopic-wi...
[3]: https://en.wikipedia.org/wiki/Nimslo