We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
THREE-DIMENSIONAL MOTION PICTURES the picture. The best lenses will cover satisfactorily somewhat more than this, but even on the new 50-mm. wide film the angle is SVa degrees greater, and then the lenses available are either appreciably poorer at the border or show an intermediate zon of blurring. The old 70-mm. wide film carries the field clear out to 25 degrees; and it is obvious from the data given here, as well as from practical experience with such film, that no lens covers this field with anything approaching the definition attained with standard film. Thus, a careful study of the properties of the prin cipal sharply imaging motion picture lenses not only shows their individual points of superiority and the absence of a "universal" len£, but makes it quite clear that definition to the degree now attained with standard film can not be attained on substantially larger areas if equal lens speeds are to be used. On the other hand, wider pictures can be optically compressed satisfactorily Into the area in which good images are obtainable. Several wide film pictures were shown in 1930. Opinions as to the sharpness of the images in these pic tures vary with the interest and attention of the ob server and with his skill in taking account of detail and contrast as they affect apparent definition. Clever com position and lighting play an important role in the appearance of such pictures. Certain of the wide film pictures shown were very objectionally lacking in por trayal of detail. They all showed distinct loss of defini tion in the outer portrayal of the picture. It seems hardly necessary to mention here the very poor results' obtainable when wide screen pictures are attempted when using reduced film images of modified shape blocked out on standard film. When it comes to projection the same or greater difficulties present themselves. The focal lengths are longer, 4 to 7 inches, and in order to obtain, with a suit-