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BS 4120:1968
BS 4120:1968 Methods for the measurement of performance of still projectors
standard by BSI Group, 09/26/1968
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M00017388
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General conditions of test. Test methods for determining accuracy of location of the pictures projected on the screen, resolving power, uniformity of illumination, temperature rise of slide, distance between lens and screen for a 1 m wide picture, light output and working temperature of casing.Cross References:
BS 1363
BS 1915
BS 1917
