diff --git a/SuperBuild/CMakeLists.txt b/SuperBuild/CMakeLists.txt
index 75cc4160..6669f4b0 100644
--- a/SuperBuild/CMakeLists.txt
+++ b/SuperBuild/CMakeLists.txt
@@ -243,7 +243,7 @@ externalproject_add(dem2points
 externalproject_add(odm_orthophoto
     DEPENDS           opencv 
     GIT_REPOSITORY    https://github.com/OpenDroneMap/odm_orthophoto.git
-    GIT_TAG           315
+    GIT_TAG           317
     PREFIX            ${SB_BINARY_DIR}/odm_orthophoto
     SOURCE_DIR        ${SB_SOURCE_DIR}/odm_orthophoto
     CMAKE_ARGS        -DCMAKE_INSTALL_PREFIX:PATH=${SB_INSTALL_DIR}
diff --git a/SuperBuild/cmake/External-OpenMVS.cmake b/SuperBuild/cmake/External-OpenMVS.cmake
index 122c4266..55477877 100644
--- a/SuperBuild/cmake/External-OpenMVS.cmake
+++ b/SuperBuild/cmake/External-OpenMVS.cmake
@@ -53,7 +53,7 @@ ExternalProject_Add(${_proj_name}
   #--Download step--------------
   DOWNLOAD_DIR      ${SB_DOWNLOAD_DIR}
   GIT_REPOSITORY    https://github.com/OpenDroneMap/openMVS
-  GIT_TAG           301
+  GIT_TAG           317
   #--Update/Patch step----------
   UPDATE_COMMAND    ""
   #--Configure step-------------
diff --git a/opendm/photo.py b/opendm/photo.py
index b0af5170..3e75a250 100644
--- a/opendm/photo.py
+++ b/opendm/photo.py
@@ -617,9 +617,11 @@ class ODM_Photo:
                 else:
                     result.append(None)
             return result
-        else:
+        elif hasattr(tag.values, 'den'):
             return [float(tag.values.num) / float(tag.values.den) if tag.values.den != 0 else None]
-    
+        else:
+            return [None]
+
     def float_value(self, tag):
         v = self.float_values(tag)
         if len(v) > 0: