diff --git a/src/canonmn_int.cpp b/src/canonmn_int.cpp
index f55627a6..1ee26694 100644
--- a/src/canonmn_int.cpp
+++ b/src/canonmn_int.cpp
@@ -2775,7 +2775,7 @@ namespace Exiv2 {
             // maybe short focal length max aperture and hyphen, surely at least single max aperture e.g.: f/4.5-5.6
             // short and tele indicate apertures at the short (focal_length_min) and tele (focal_length_max)
             // position of the lens
-            "(?:(?:f\\/)|T)(?:([0-9]+(?:\\.[0-9]+)?)-)?([0-9]+(?:\\.[0-9])?)"
+            "(?:(?:f\\/)|T|F)(?:([0-9]+(?:\\.[0-9]+)?)-)?([0-9]+(?:\\.[0-9])?)"
             // check if there is a teleconverter pattern e.g. + 1.4x
             "(?:.*?\\+.*?([0-9.]+)x)?"
             );
diff --git a/tests/lens_tests/utils.py b/tests/lens_tests/utils.py
index b3d61319..74b5af3e 100644
--- a/tests/lens_tests/utils.py
+++ b/tests/lens_tests/utils.py
@@ -19,7 +19,7 @@ LENS_META_DEFAULT_RE = re.compile(
         ".*?"
         # maybe short focal length max aperture and hyphen, surely at least single max aperture e.g.: f/4.5-5.6
         # short and tele indicate apertures at the short (focal_length_min) and tele (focal_length_max) position of the lens
-        "(?:(?:f\/)|T)(?:(?P<aperture_max_short>[0-9]+(?:\.[0-9]+)?)-)?(?P<aperture_max_tele>[0-9]+(?:\.[0-9])?)"
+        "(?:(?:f\/)|T|F)(?:(?P<aperture_max_short>[0-9]+(?:\.[0-9]+)?)-)?(?P<aperture_max_tele>[0-9]+(?:\.[0-9])?)"
         # check if there is a teleconverter pattern e.g. + 1.4x
         "(?:.*?\+.*?(?P<tc>[0-9.]+)x)?"
     )