PHOTOGRAPHING MOVING OBJECTS.
A camera has been invented by Captain F. J. Behr, of the United States Coast Artillery, that marks a great advance in the art of photographing swiftly moving objects. It differs from the ordinary camera in j siise and in the mechanism of its shutter. It is almost four feet high. An electric motor that makes several thousand revolutions a second works the shutter; and since the speed of the motor can be accurately adjusted, the photographer can determine the length of exposure dov/n to one fivethousandth of a second. The. new camera has photographed mortar shells at the moment when they left tlie muzzle of the gun, and afterwards, and has shown the curious "smoke ring" or "gas ring" that accompanies the projectile when it emerges from, the gun. It may yet help to determine exactly what happens when a modern high-power shell ploughs its way through solid steel.
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https://paperspast.natlib.govt.nz/newspapers/THS19170108.2.8.3
Bibliographic details
Thames Star, Volume LVIII, Issue 10287, 8 January 1917, Page 3
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153PHOTOGRAPHING MOVING OBJECTS. Thames Star, Volume LVIII, Issue 10287, 8 January 1917, Page 3
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