The 3-D Process
The film used a single strip 3-D process which involved two 2:35:1 format images being printed onto one 4:3 frame of film, stacked one over the other. Traditionally, this process is known as the "over and under" process. This camera system was named the Marks 3-Depix StereoSpace Converter (though the film posters heralded it as both "SuperVision" and "WonderVision"). In order to be projected in the Polarization 3-D process and viewed with clear glasses, the film required a 3-Depix Reverser to re-order the over and under images into separate projections. Tony Anthony himself was credited with designing a relatively low cost projection lens which made the film marketable for general release.
Read more about this topic: Treasure Of The Four Crowns
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