The Zeiss Jena APO primes are a distinctive series of lenses developed by Carl Zeiss Jena, a renowned optical manufacturer based in East Germany during the Cold War era. Following the division of Germany after World War II, Carl Zeiss was split into two separate entities: Carl Zeiss Jena in East Germany and Carl Zeiss Oberkochen in West Germany. This division led to the development of different lens technologies and designs on either side of the Iron Curtain.
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