That's a fascinating link. Thanks for sharing. It obviously worked very well, but has very few limitations on what you can shoot. Certainly a genius to figure this out. This was like the early version of the big shot which you shot in rapid succession with each filter.
But seriously Ernst had a camera that my friend George Phillips bought that had ability to shoot 3 plates at one time with the red, blue and green. He showed me it and how it worked but never got the chance to buy it. I wish I could think of the name of that camera. This one was made of all aluminum and very tech looking. Any body else seen this camera. I try to study every camera and process to incorporate it in some of landscapes.