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Optical and imaging magnification is a ratio of image angular subtense to object angular subtense. Electronic, or linear, magnification is the ratio of monitor size to sensor size. For example, 13" monitors are between 38 and 39 times as large as ½" size format sensor cameras when comparing horizontal, vertical, or diagonal measures.
See also Sensing Area , Doubler Tube , Parfocality , Telecentric Lens , Field of View (FOV) , Distortion
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