diff --git a/src/canonmn_int.cpp b/src/canonmn_int.cpp
index 70315a91..07e994c5 100644
--- a/src/canonmn_int.cpp
+++ b/src/canonmn_int.cpp
@@ -1977,6 +1977,7 @@ namespace Exiv2 {
         {  368, "Sigma 14-24mm f/2.8 DG HSM"                                }, // 9
         {  368, "Sigma 70mm f/2.8 DG Macro"                                 }, // 10
         {  368, "Sigma 18-35mm f/1.8 DC HSM | A"                            }, // 11
+        {  368, "Sigma 35mm f/1.4 DG HSM | A"                               }, // 12
         {  488, "Canon EF-S 15-85mm f/3.5-5.6 IS USM"                       },
         {  489, "Canon EF 70-300mm f/4-5.6L IS USM"                         },
         {  490, "Canon EF 8-15mm f/4L Fisheye USM"                          },
@@ -2132,7 +2133,7 @@ namespace Exiv2 {
         { 250, printCsLensByFocalLength }, // not tested
         { 254, printCsLensByFocalLength },
         { 255, printCsLensByFocalLength }, // not tested
-        { 368, printCsLensByFocalLength },
+        { 368, printCsLensByFocalLengthAndMaxAperture },
         { 491, printCsLensByFocalLength },
         { 493, printCsLensByFocalLength }, // not tested
         { 624, printCsLensByFocalLengthTC },
@@ -3217,6 +3218,9 @@ namespace Exiv2 {
         else if (frac == 0x14) {
             frac = 64.0f / 3;
         }
+        else if ((val == 160) && (frac == 0x08)) { // for Sigma f/6.3 lenses that report f/6.2 to camera
+            frac = 30.0F / 3;
+        }
         return sign * (val + frac) / 32.0f;
     }