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Sigma Unveils 100-400mm F5-6.3 DG DN OS Contemporary Telephoto Lens for Full-Frame ...

RONKONKOMA, N.Y., June 18, 2020 (GLOBE NEWSWIRE) -- Sigma Corporation today made the following announcements: - TC-1411 magnifies lens focal length by 1.4x. - TC-2011 magnifies lens focal length by 2x ...