20 pages.
In this monograph, Shelton explains the basic mathematical formulas that deal with photographic optics. He discusses the basic concepts of light. He displays the optical formulae in large, bright colors and discusses how to use them. Shelton solves sample problems and then tasks the reader to solve a problem dealing with that formula. He uses color illustrations to show the various optical concepts on which these formulas apply, such as f-number and aperture, depth-of-field, hyperfocal distance, circle of confusion, and achromatic lenses.
Read brief key ideas from the monograph.
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