Better lens for 35-mm cinematograph projector.
A new design for a five-element lens system has been developed at a focal length of 100 mm and relative aperture of f/1.9 for use as a 35-mm cinematograph projector objective. Another design of a double-Gauss system having a five-element configuration which is in current use has also been developed using superior glasses. The performances of the two designs have been compared. The new design is found to have better potential for aberration correction.
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