correcting aperture

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• Catadioptric system — A 150 mm aperture catadioptric telescope (Maksutov) A catadioptric optical system is one where refraction and reflection are combined in an optical system, usually via lenses (dioptrics) and curved mirrors (catoptrics). Catadioptric… …   Wikipedia

• André Kertész — Infobox Person name = André Kertész image size = caption = André Kertész in New York, 1982 birth name = Andor Kertész birth date = July 2, 1894 birth place = Budapest, Hungary death date = September 28, 1985 (aged 91) death place = New York City …   Wikipedia