Ronkonkoma, New York — January 14, 2020 – Sigma Corporation of America, a leading camera, photography lens, cine lens, flash and accessories manufacturer, will have its complete product lineup on display at the 2020 Imaging USA Expo, hosted by Professional Photographers of America (PPA) at the Gaylord Opryland Resort and Convention Center in Nashville, TN from Ronkonkoma, New York — January 14, 2020 – Sigma Corporation of America, a leading camera, photography lens, cine lens, flash and accessories manufacturer, will have its complete product lineup on display at the 2020 Imaging USA Expo, hosted by Professional Photographers of America (PPA) at the Gaylord Opryland Resort and Convention Center in Nashville, TN from