Patent: Sigma 50mm f/1.2, 40mm f/1.2 for Sony E-mount

Along with recently released Sigma 35mm f/1.2 DG DN Art lens (B&H Photo Video/Adorama) for Sony E-mount, Sigma currently has another two new lens patent for Sigma 50mm f/1.2 lens and Sigma 40mm f/1.2 lens.

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