Word: shutters
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Umpteen million amateur photographers will read the article about George Tames's picture of President Eisenhower [TIME, Feb. 15], and I'll wager 90% of them will wonder what kind of camera . . . what f. opening . . . what shutter speed . . . what light source...
...streets of East Berlin, a camera shutter caught for posterity the proof that man of 1953, on city streets and against the odds, would risk everything for freedom: two brave youths fought off Soviet army tanks with stones. It was June 17-the day East Germans rose up against their Communist oppressors across their barbed-wire land, the day that showed that the Red monolith might some day crack...
...just-exploded atom bomb is a difficult subject for photography. Its fireball expands so suddenly that no ordinary shutter can act quickly enough to freeze its motion. Last week the Atomic Energy Commission released a picture of a "nuclear device" caught in the very act of vaporizing the tower on which it had stood...
...picture was taken with a special camera made by Edgerton, Germeshausen & Grier, Inc. of Boston. Its shutter has no moving parts, only two sheets of polarizing material, something like the stuff in the glasses that are used to view 3-D movies. When light passes through the first of them, it is polarized so that its waves vibrate in a single direction. Then it cannot pass through the second sheet, whose plane of polarization is set at right angles to that of the first sheet. In this condition the shutter is closed...
...coil, it creates a magnetic field in the glass which rotates the light waves so that they pass through both of the polarizing sheets and reach the film of the camera. The light can pass only while the current is flowing, so a very short pulse opens the shutter for as little as one millionth of a second. Some such speed was necessary to picture the doomed tower when it was only half-vaporized by the hungry fireball...