Zoom lens system
作者： Ogata Yasuzi
DOI:
关键词:
摘要: A zoom lens system has (in order from the object side of system) a first unit with positive refractive power, second and third negative power. The an aperture stop, element, cemented doublet. Airspaces are disposed between units, element doublet, units. performs operation when units moved toward so that airspace is widened while narrowed.
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