The only thing of interest here is that these cheap rings were shot on (expensive) 11x14 transparency film.  Ted Pobiner had their own E6 line as it was called, and, as you might imagine, processing color film can be tricky.  They never wanted to spend the money on a technician who knew how to do it, so some photographer would get roped into trying to make the thing work.  The color would shift so quickly, often tens of units of shift in an hour that you had to anticipate the color shift and add Wratten gels in front of your lens and cross your fingers.  You can see how I failed to do that in this shot which is shifted wildly yellow/green (Invariably the art directors wanted neutral gray backgrounds which all had to match from shot to shot, so the color had to be right on the money.)  

Also, shooting an 11x14 camera was an adventure.  They were ancient things, and the bellows were so long that you couldn’t reach the front rail to adjust the focus.  The lenses were sharp, but ancient and didn’t have shutters in them, so you’d figure out the exposure, cover the lens, pull the dark slide out of the massive 11x14 film holder, expose the lens and count out how many seconds seemed correct.  Good times!