Click the picture for a Holmes Card image suitable for printing at actual size. (7in by 3.5in)
I recently met another stereo photographer in the area where I live, Mike Hales, who is an engineer at a local television studio. He told me of a very clever idea which allows you to make genuine 3D stereo pairs from 2D movies: simply find a segment of film where the camera is moving and freeze two frames with the camera displaced a suitable distance to get a stereo separation. I tried this at the first opportunity I had (not the same day - I had to upgrade to a VCR with a good freeze-frame/single-step first) and to my utter amazement it worked first time. The image above is the proof.
I can't wait to produce stereo images from many classic films which were shot in 2D! Try it yourself and let me know how it turns out!