A NOVEL CAMERA.

Ashburton Guardian, Volume XXXIII, Issue 8832, 7 May 1914, Page 6

A NOVEL CAMERA.

But the chief value of the novel

camera lies in the shutter, which is the invention of; Mr Gustav Dietz, oi .New York. This snutter is operated by an electric; motor | that ' makes several thousand revolutions, a,minute. As the speed of this motor is capable <rf accurate adjustment, the photographer can determine the exact length of the exposure up to 1-5000 of a second. This is the shortest fraction of time during which the light waves will make a definite impression <m the highly sensitised plates,. and, as it is possible to obtain clear photographs of projectiles in flight with this exposure, experiments with other kinds of shutters or plates were not

, conducted. Once the style of camera ' was definitely decided -upon, the next problem was how to release the shutter at the exact -time the shell was in the position desired. This was manifestly impossible through mere human means, because the eye cannot even perceive the shell in flight, much less give the order necessary for the pressing of a button so as to catch the projectile in mid-air.