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August 02, 2010 10:03 ET | Source: Sigma Corporation of America

Sigma Corporation's New APO 70-200mm F2.8 EX DG OS HSM Lens Now Available

RONKONKOMA, NY--(Marketwire - August 2, 2010) - Sigma Corporation of America (www.sigmaphoto.com), a leading researcher, developer, manufacturer and service provider of some of the world's most...
June 30, 2010 11:41 ET | Source: Sigma Corporation of America

Sigma Corporation of America Launches Family-Centric Photo Contest for Moms

RONKONKOMA, NY--(Marketwire - June 30, 2010) - Sigma Corporation of America (www.sigmaphoto.com) is kicking off the start of summer with a fun and exciting photography contest geared toward moms...
February 24, 2010 14:05 ET | Source: Sigma Corporation of America

Sigma Corporation of America Launches New, Interactive Community Web Site

RONKONKOMA, NY--(Marketwire - February 24, 2010) - Sigma Corporation (www.sigmaphoto.com), a leading researcher, developer, manufacturer and service provider of some of the world's most impressive...