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Sigma Corporation of America is a subsidiary of the Sigma Corporation, a Japanese based family owned manufacturer of DSLR cameras, camera lenses and camera accessories. Founded in 1961, Sigma Corporation prides itself on high quality and innovative photographic equipment.
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YMS旗下站点分别有YMS工作室和YMS云分享，YMS云分享专注于发布云计算、区块链及互联网科技最新资讯和最新最全的网站源码分享。