Abstract
The panoramic lens described was developed at a time when such a lens seemed a desirable means of achieving the large angle of view required under certain conditions for the so-called wide film, the film width in question being 70 mm. The full-field angle across the film with this lens was nearly 50 degrees, as compared with about 28 degrees for standard 35-mm. film using the same focal length lens. The film is held in a gate curved horizontally, the curve facing the lens and of a radius approximately equal to the focal length of the lens. The lens revolves about its rear nodal center, so that the axis of the lens sweeps out the entire angle of the picture. Because of the design of the lens, and a special shutter revolving with it in a plane near the film, allowing only a limited portion of the field to be imaged upon the film at a given instant, a sharp picture results.
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