Oh boy, more people should have seen his personal website at its prime... and although much of the evidence has conveniently disappeared (not crawled by the archive), there should be some of its traces in one or another Booru, or wherever.
Come on! I'm sure you are aware that Mr. Cuarón excuse about the camera's weight as a limitation holds well its ground here. The kind of camera travellings including three-dimensional movement he deemed necessary for that film makes very difficult using prior technology digital 3D-capture cameras for it (and we should give thanks heavy film platters aren't needed for such products anymore).
Even though that latest IMAX camera is touted as a definitive improvement in terms of weight, compared to the non-listed specific amount of it given by the company there are recent milestones on cinematography material in more comparable, non-compact, modular & mountable form format cameras like the Sony F65 CineAlta for a fraction of the mass (5.0Kg-6.5Kg).
