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WIDK FILM DEVELOPMENT
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those of the 35 millimeter, and the design has been such that this is a surprisingly large number of cases.
The most outstanding changes are found in the shutter, which had to be made practically double the size of the old one, and in the actual film-moving mechanism. The gears of the GrandeurMitchell are cut differently, as the pitch of the Grandeur perforations is approximately .231" against a pitch of .87" for the 35 millimeter standard. In all other respects the 70 millimeter Mitchell is identical with the 35 millimeter. Special Grandeur lenses having a greater angular covering power are used.
Grandeur projectors are being manufactured by the International Projector Corporation, and many of the major Fox theatres are
The Mitchell 7 0 mm. camera for making Grandeur pictures.
being equipped with them, and according to the present plans of that organization all the Fox houses will ultimately have this equipment.
What are the advantages of a wider film?
The present standard of 35 millimeters was arrived at purely by chance, as Mr. Gregory pointed out. being largely due to the coincidence that the standards independently arrived at by Edison and Lumiere coincided to within 1 1000 of an inch. This width film gave a frame of 18 mm. x 23 millimeters, and when the great theatres of the present came into being with colossal throw and large screen, a tremendous enlargement of this tiny picture was necessary. This can be done only to a certain point, and then the matter of grain interferes.
Then, too, the exigencies of sound pictures added another problem. The addition of the sound track to the film reduced the