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Current document root: Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 3, March 1931)

The Depth of Field of Camera Lenses with Special Reference to Wide Film

SMPTE • Journal Article • [Active]

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  • 1 See, for example, “The Distribution of Light in Optical Systems,” Hardy A. C. , Journal of the Franklin Institute , Vol. 208 , No. 6 , December, 1929 . It may be remarked in passing that the f/number is a measure of the illumination on the film only when the lens is focused on an object at infinity.EXTERNAL