telephotography :

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  • n  transmission and reproduction of photographs and charts and pictures over a distance
  • n  photography using a telephoto lens

  • Four years ago he invented vacuum bulbs used in telephotography (sending still pictures by electricity or radio); three years ago he improved the bulb so that it would transmit .
  • Alexanderson's feat was to utilize a beam of light (which in motionless telephotography has from 2 to 20 minutes to trace and transmit the desired light-pattern or image) at .
  • The device is somewhat similar to that used in " telephotography," the light reflected from the pictures being cut into innumerable flashes by a " radio eye," a revolving disc .

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