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Optical Terms and Concepts
Basic Optical Components
Instruments and the Eye
8 other sections not shown
aberrations accommodation angular aperture apparent field astigmatism astronomical telescopes beam of light binoculars bundles camera collimation color cone considerable convergent course critical angle curvature defect degree diameter diaphragm diopter scale discussed distant object divergent edge exit pupil exposure eye relief eyepiece field of view film focal length focal plane focal ratio focus focusing game scope greater hence human eye hyperopia illumination image formed image plane image point inches infinity interpupillary inversion larger lens coating lenses located magnification manufacture measured ment microscope mirror mounted necessary negative lens object point observer optical elements optical instru optical instrument optical system parallax parallel light perpendicular picture placed polarized Porro prism positive lens possible prism erecting system projector range real image reflecting telescope refraction remember require resolving power result reticle retina rifle scope seen separate shooting side spotting scope surface target scope usually vignetting virtual image vision yards