Lenses
Red Truck by the Pecan Farm. © 2003 Steve Lama.
Chapter 4 Overview
After a discussion of the basic optics used in the creation of lenses, this chapter looks at basic types of lenses and how lenses control exposure, angle of view, and focus.
Basic Optics
In order to form an image, light must be transmitted from the subject to the sensor. Optics accomplishes this task. The principles of optics describe how light is modulated and directed. In the study of optics, absorption, transmission, reflection, and refraction constitute major areas. These effects change the direction of light and determine how lenses and image capture work within digital ...
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