(Bernard Price Institute for Palaeontological Research, 1977) Thackwray, H. O.
The need for a gadget for taking stereo pairs of
photographs has been evident for some time. What
was needed was a cheap, pocket-sized gadget that
would fit all makes of cameras, could be used for
close-up photos, large immovable objects and even
landscapes. It had to be simple and easy to operate.