Lens or opening Stage lighting instrument

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optics of altman 1000q followspot. left right: lamp, ellipsoidal reflector, shutter/iris assembly, fixed lens, variable lens.


the opening of samad gap in housing beam of light intended come. many fixtures use lens control beam of light, though some, such border or cyclorama lights, not have lenses or optics other reflector. lens , reflector, along other beam-altering devices both considered part of optics system.







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