Stephen I use the standard over/under 3D lens and simply turn it 90 degrees and that converts it to a side by side lens. The same 3D glasses are used for both over/under and side by side formats. I can play 3D movies using either Dolby 3D filters or Panavision filters. It seems the Panavision has a better color display than the Dolby filters. And yes, the side by side takes an anamorphic in the front to unsqueeze the image. It too is turned 90 degrees like the rear split lens.What's your optical equipment for running these? Obviously an anamorphic lens to unsqueeze the image, but do you also have a polariser that's split vertically?