diff --git a/gallery/utils/metadata/helpers.py b/gallery/utils/metadata/helpers.py
index bbac087..e7b8cd3 100644
--- a/gallery/utils/metadata/helpers.py
+++ b/gallery/utils/metadata/helpers.py
@@ -279,7 +279,7 @@ def lens_specification(value):
     """
     try:
         return str(value[0] / value[1]) + 'mm - ' + str(value[2] / value[3]) + 'mm'
-    except ValueError:
+    except TypeError:
         return None