Ronkonkoma, New York — September 4, 2019 – Sigma Corporation of America, a leading camera, DSLR lens, flash and accessories manufacturer, today announced that two of its telephoto zoom lenses, the 70-200 F2.8 DG OS HSM Sports ($1,259 for a limited time, regularly $1,499; available in Canon, Nikon and Sigma mounts) and the 60-600 F4.5-6.3 DG OS HSM Sports lenses Ronkonkoma, New York — September 4, 2019 – Sigma Corporation of America, a leading camera, DSLR lens, flash and accessories manufacturer, today announced that two of its telephoto zoom lenses, the 70-200 F2.8 DG OS HSM Sports ($1,259 for a limited time, regularly $1,499; available in Canon, Nikon and Sigma mounts) and the 60-600 F4.5-6.3 DG OS HSM Sports lenses