high school, for my own amusement I've drawn pencil sketches of
plans, playing with the challenge of working out the geometry.
Here is one category: broadcast
including a low-ceiling studio, that I imagined constructing with
primitive technology. These days, there are better methods.
the 1960s, broadcasters began using hand-held TV cameras as a more
mobile alternative to bulkier traditional cameras. But the
weight of a "hand-held" is actually supported on the
cameraman's left shoulder. While I was still in high school in
1964, I sketched an even smaller camera that would literally be held
in the operator's left hand.
my design, the lens is at the top of the front of the camera.
Two partly-silvered mirrors and five prisms separate the light and
direct it to the red, green, and blue camera tubes, which are mounted
vertically below the prism assembly. (An extra lens is needed
at 9 because the light path to that tube is longer.) A small
electronic viewfinder is also mounted on the top of the camera, along
with a pair of tally lights and a zoom lever.
zoom lens is heavy and bulky and would unbalance this little camera,
making it even more difficult to hold. So I specified a simple
fixed-focal-length lens and a "scan-type" zoom, akin to
what is now called a digital or electronic zoom, which would
unfortunately have compromised the image quality. To zoom in,
the camera would be electronically adjusted to scan a smaller portion
of the image on its tubes.
of course, tubes have been replaced by solid-state sensors, and
cameras can be much smaller than this.