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Aviation History
1921
1921 - 0167.PDF
MARCH IO, 1921 EASTMAN KODAK AERIAL CAMERAS QUITE apart from all military considerations, there are un- doubtedly vast possibilities in Aerial Photography, and many and various are the U3ES to which the combination of aircraft and camera may be put. Ordnance survey is one of the most important, and the efficiency and accuracy of map-making by means of aerial photographs has been demonstrated during the past few years. Then, from the more commercial point of view, there is the photography of estates, buildings, factories, etc., for which there must always be a demand, as when done from the air the results are much more convincing and more complete than similar work executed from terra firma. Already excellent aerial photographic work has been carried out in Canada and America in connection with ranches, forestry and the like. cast aluminium, and the " cone " of sheet aluminium. An " inspection " door is fitted in the cone, giving access to the inner element of the lens. The direct vision sight tube may be fitted either above or below the camera, according to the operator's requirements, a groove being provided top and bottom of the camera body for this purpose. At the top of the camera body, on the right-hand side, is a key for setting the focal-plane shutter, and the latter is released by a very "comfortably" placed thumb-lever immediately behind the right-hand grip. Exposures varying from 1/120 to 1/435 of a second may be made by adjusting the tension of the focal-plane shutter—which has a fixed aperture—by means of a second key placed below the setting key. THE EASTMAN KODAK A-l AERIAL CAMERA, HAND TYPE: The complete camera is shown on the left, and in the centre is the plate magazine and changing bag (the operating lever indicated by the arrow). The view on the right shows the lens exposed by the safety shutter. It is only natural, having attained a commanding position of many years' standing in the sciences of photography, that the world-wide known firm of Eastman Kodak should associate itself with aerial photography. With the experience gained in connection with war work—and " Kodak's " did much of the necessary experimental work in America—they are able to place on the market some aerial " Kodaks " that should prove to be very useful and efficient for peace-time aerial work. Two of these cameras, the A-i and the K-i, are shown in the accompanying illustrations, whilst the following brief particulars of both may be of interest. Model A-i is a hand- held and operated camera for plates or cut films, size 5 x 4 ins. It is light, compact, and simple in operation, and the two hand-grips—one on each side—give, it is claimed, considerable control. The body of the camera is made of The lens fitted to this camera is an Eastman 10-in. " Hawk Eye," with a fixed aperture of f. 4-5. Accurate adjustment at infinity focus is permitted by the standard mount being provided with a running thread and setscrew. As a protection against exposure of the lens to fog, mist or dirt, or against fogging the plate when the shutter is reset, a safety shutter is mounted in front of the lens. The initial pressure on the thumb-lever release opens this shutter just before the exposure is made. This shutter is readily removed for the purpose of refocussing or cleaning the lens. It will be noticed that lugs are provided on the hand-grips for attaching shoulder straps, when required. A simple and ingenious plate magazine is provided for 12 plates or films. This is shown in one of the accompanying illustrations, from which it will be seen that at the side of the magazine box is a hooked lever. Pulling this lever out to THE EASTMAN KODAK K-l AUTOMATIC AERIAL CAMERA : The camera (on the left) is shown connectedup to the paddle-wheel wind motor, whilst on the extreme right is a rear view of the wind motor, showing the damper, A, its control lever, B, and the Venturi tube, C. < 167 ••• •'•/.''.'^--'^•^'••y- '-%::-.;r~"t ..
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