Airships past and present, together with chapters on the use of balloons in connection with meteorology, photography and the carrier pigeon . Fig. 215.—Batuts kite for photographicapparatus. Fig. 216.—Panoramic apparatusfor a balloon without observers. w^as an astigmatic one by Zeiss, had a focal length of 2J in., andthe plates wTere 4f by 4|, subtending at the lens an angle of 88°;the photographs therefore overlapped one another by 14°. At aheight of 200 or 300 yards, he was able with one exposure tocover an area of 40 square miles. The photographs were subse-quently enlarged, which naturally
Airships past and present, together with chapters on the use of balloons in connection with meteorology, photography and the carrier pigeon . Fig. 215.—Batuts kite for photographicapparatus. Fig. 216.—Panoramic apparatusfor a balloon without observers. w^as an astigmatic one by Zeiss, had a focal length of 2J in., andthe plates wTere 4f by 4|, subtending at the lens an angle of 88°;the photographs therefore overlapped one another by 14°. At aheight of 200 or 300 yards, he was able with one exposure tocover an area of 40 square miles. The photographs were subse-quently enlarged, which naturally magnified any errors. Formilitary purposes he devised a so-called perspectometer, bymeans of which all dimensions and distances were to be legiblymarked on the photograph, after being magnified ten times. Captain Scheimpflug constructed a panoramic apparatus forsimilar purposes, having lenses with converging axes. His PHOTOGRAPHY BY MEANS OF KITES & POCKETS. 339 apparatus, together with an electric device for releasing theshutter, and, including levels and plates, weighed 10 lbs. Heoriginally proposed to suspend the camera l
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Keywords: ., bookcentury1900, bookdecade1900, bookpubl, booksubjectaeronautics
