Sigma 50mm 1.4 art vs canon 1.2 July 8, 2019 16 32 64 128 Sigma 50mm 1.4 art vs canon rf 50mm 1.2 Sigma 50mm 1.4 art vs canon ef 50mm 1.2 Sigma 50mm vs canon 50mm 1.2 Canon ef 50mm 1.2 vs sigma 50mm art Sigma 50mm 1.4 art canon r5