The handbook of motion picture photography (1927)

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PICTURE PHOTOGRAPHY at first, then too slow, the subject will jerk about upon the screen in the most disconcerting manner. Proper control of the automatic camera cannot be too strongly emphasized. It must be remembered that the actual motion of the camera will be shown upon the screen exaggerated by from fifty to two hundred times according to the size of the screen. An up and down motion, due to trembling hands, and amounting to one-fiftieth of an inch, would appear upon a nine foot screen as the motion of almost three inches ! This of course must be avoided. Likewise, if the camera is swung from side to side to show a panorama, a large group of people or other stationary objects, the motion must be very slow and deliberate or the screen result will be painful to view. When the scene has been filmed, it is well to ''slate'' it. Data in brief form or a distinguishing number is written upon a small slate and this is photographed upon three or four frames by a half turn of the crank. This serves as an aid to memory in later classification of the films. Such is the usual procedure in motion photography. There are innumerable special methods, many of which can not be mentioned in a condensed work of this nature, but the more important will be discussed in other portions of the work under their proper headings. 131